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Worksheets

DIGESTIVE SYSTEM

Total questions: 172

Worksheet time: 2hrs 46mins

Name
Class
Date
1.
The main purpose of the ____________ system is to break food particles into pieces that can be used.
a)
circulatory
b)
respiratory
c)
digestive
d)
skeletal
2.
Nutrients from digested food are absorbed in which digestive organ?
a)
Small Intestine
b)
Stomach
c)
Large Intestine
d)
Gallbladder
3.
Number 3 is pointing to the...
a)
Small intestine
b)
Rectum
c)
Large intestine
d)
Stomach
4.
Number 2 is pointing to the...
a)
Esophagus
b)
Stomach
c)
Small intestine
d)
Anus
5.
Which organ pushes food down to the stomach?
a)
Mouth
b)
Esophagus
c)
Rectum
d)
Large intestine
6.
Which body system gets ride of solid waste?
a)
Excretory (Urinary)
b)
Digestive
c)
Circulatory
d)
Respiratory
7.
As waste moves through the digestive system, the ______ absorbs water before storing waste in the rectum.
a)
Small intestine
b)
Stomach
c)
Esophagus
d)
Large intestine
8.
Which is NOT a function of the Digestive System?
a)
To rid the body of solid waste
b)
Absorb nutrients for energy & growth
c)
Break down nutrients from food
d)
Pump blood around the body
9.
Number 7 is pointing to...
a)
Mouth
b)
Esophagus
c)
Small intestine
d)
rectum
10.
Where does digestion begin?
a)
Mouth
b)
Esophagus
c)
Stomach
d)
Small Intestine
11.

The _____________ is a long tube that connects the mouth to the stomach.

a)

Tongue

b)

Rectum

c)

Esophagus

d)

Small Intestine

12.

Which of these digestive system organs does your food NOT travel through?

a)

Stomach

b)

Esophagus

c)

Small Intestine

d)

Liver

13.

What is the correct order of digestion?

a)

Mouth - stomach - esophagus - Large intestine - Small intestine - anus - rectum

b)

Mouth - esophagus - stomach - gall bladder - small intestine - rectum - anus - large intestine

c)

Mouth - pancreas - stomach - rectum - gall bladder - small intestine - rectum - anus

d)

Mouth - esophagus - stomach - small intestine - large intestine - rectum - anus

14.

Which of the following is the best synonym for "digestion"?

a)

breaking down

b)

building up

c)

formation

d)

respiration

15.

Which of the following is NOT part of the digestive system?

a)

liver

b)

gall bladder

c)

kidney

d)

pancreas

16.
Water is absorbed in which digestive organ?
a)
large intestines
b)
pancreas
c)
small intestines
d)
liver
17.
Feces that contain high water content is a form of diarrhea.  Which digestive organ did not function properly for this to occur?
a)
stomach
b)
small intestines
c)
large intestines
d)
rectum
18.
Which organ connects the mouth to the stomach?
a)
mouth
b)
esophagus
c)
stomach
d)
small intestines
19.
In which digestive organs does absorption occur?
a)
mouth & stomach
b)
mouth & esophagus
c)
small intestines & large intestines
d)
rectum & anus
20.
In which digestive organs does elimination occur?
a)
mouth & stomach
b)
mouth & esophagus
c)
small intestines & large intestines
d)
rectum & anus
21.
Which secondary digestive organ handles the liver's "light work" by storing the bile that was produced by the liver?
a)
liver
b)
pancreas
c)
small intestines
d)
gallbladder
22.
Which substance is produced by the liver to break down fats?
a)
bile
b)
bowel
c)
gastric juices
d)
saliva
23.
In which digestive organs does both mechanical AND chemical digestions occur?
a)
mouth & stomach
b)
mouth & esophagus
c)
small intestines & large intestines
d)
rectum & anus
24.
The digestive system works with which system to distribute nutrients to the cells of your body?
a)
skeletal
b)
circulatory
c)
respiratory
d)
digestive
25.
Nutrients are absorbed in which digestive organ?
a)
large intestines
b)
mouth
c)
small intestines
d)
stomach
26.
The teeth are considered to be a part of which two (2) systems?
a)
skeletal & digestive
b)
skeletal & muscular
c)
circulatory & digestive
d)
skeletal & respiratory
27.
Which part of the mouth provides mechanical digestion?
a)
teeth
b)
saliva
c)
smooth muscles
d)
gastric juices (HCl acid)
28.
Which part of the mouth provides chemical digestion?
a)
teeth
b)
saliva
c)
smooth muscles
d)
gastric juices (HCl acid)
29.
Which part of the stomach provides mechanical digestion?
a)
teeth
b)
saliva
c)
smooth muscles
d)
gastric juices (HCl acid)
30.
Which part of the stomach provides chemical digestion?
a)
teeth
b)
saliva
c)
smooth muscles
d)
gastric juices (HCl acid)
31.
What does saliva do?
a)
Chemically digests food in the mouth.
b)
Chemically digests food in the stomach
c)
Protects the stomach from digesting iteself
d)
Absorbs nutrients from food so the body has energy.
32.
Where does digestion begin?
a)
Mouth
b)
Esophagus
c)
Stomach
d)
Small Intestine
33.
What organ makes bile?
a)
Gallbladder
b)
Liver
c)
Pancreas
d)
Appendix
34.
Why do we eat food?
a)
To keep our stomachs full
b)
To put oxygen into the body cells
c)
To get nutrients and energy
d)
To make waste products
35.
The muscular organ in the body where chemical and mechanical digestion take place.
a)
pancreas
b)
liver
c)
stomach
d)
esophagus
36.
A substance such as a fat, a protein, or a carbohydrate that a living thing needs to survive.
a)
saliva
b)
carrots
c)
nutrients
d)
minerals
37.
The process by which the body breaks down food so that it can be used for energy.
a)
composition
b)
digestion
c)
deposition
d)
absorption
38.
What is the small intestine responsible for?
a)
takes in more enzymes and starts absorption
b)
breaking down food
c)
chewing
d)
adding food
39.

What part of the digestive system is highlighted?

a)

Esophagus

b)

Appendix

c)

Small Intestine

d)

Stomach

40.

What part of the digestive system is highlighted?

a)

Small intestine

b)

Large intestine

c)

Stomach

d)

Liver

41.

What part of the digestive system is highlighted?

a)

Large intestine

b)

Small intestine

c)

Stomach

d)

Appendix

42.

What part of the digestive system is highlighted?

a)

Small Intestine

b)

Large intestine

c)

Stomach

d)

Liver

43.

Where does the digestion of proteins take place?

a)

Mouth and stomach

b)

Stomach and small intestine

c)

Mouth and small intestine

d)

Mouth, stomach and small intestine

44.

Where does the digestion of carbohydrates take place?

a)

Mouth

b)

Mouth and Stomach

c)

Mouth and small Intestine

d)

Mouth and large intestine

e)

Stomach

45.

Where does the digestion of lipids take place?

a)

Stomach

b)

Stomach and small intestine

c)

Small intestine

d)

Mouth, stomach and small intestine

e)

Mouth and small intestine

46.

What is the aim of the digestion?

a)

Obtain matter and energy

b)

Obtain nutrients from food and break it down into small molecules, which are then absorbed

c)

Break down food into inorganic nutrients

d)

Obtain nutrients form food and transport it to the cells

47.

Where does the absorption take place?

a)

Oesophagus

b)

Stomach

c)

Small intestine

d)

Large intestine

e)

Digestive tract

48.

What are the two components of the gastric juice?

a)

Pepsine and hydrochloric acid

b)

Saliva and bile

c)

Bile and hydrochloric acid

d)

Amyase and hydrochloric acid

49.

Which are the three juices released in the duodenum (small intestine)?

a)

Bile, pancreatic juice and gastric juice

b)

Bile, pancreatic juice and intestinal juice

c)

Bile, gastric juice and saliva

d)

Bile, intestinal juice and pancratic juice

50.

Which are the nutrients digested in the mouth?

a)

Carbohydrates and proteins

b)

Proteins

c)

Carbohydrates

d)

Fats

e)

All the abov

51.

. Which are the nutrients digested in the stomach?

a)

Carbohydrates

b)

Proteins

c)

Carbohydrates and proteins

d)

Fats

e)

All the above

52.

Which are the nutrients digested in the small intestine?

a)

Carbohydrates and proteins

b)

Proteins

c)

Carbohydrates, proteins and lipids

d)

Lipids and proteins

e)

Lipids

53.

What is the enzyme contained in the saliva?

a)

Amylase

b)

Pepsine

c)

Hydrochloride acid

d)

Lipase

54.

Where is the bile stored?

a)

Liver

b)

Gall bladder

c)

Pancreas

d)

Small intestine

55.

Which is the nutrient that bile facilitates its digestion?

a)

Proteins

b)

Lipids

c)

Carbohydrates

d)

Protein and lipids

56.

Where is the pancreatic juice released?

a)

Small intestine

b)

Stomach

c)

Large intestine

d)

Mouth

57.

Where is the gastric juice released?

a)

Stomach

b)

Small intestine

c)

Mouth

d)

Large intestine

58.

Where is the bile produced?

a)

Liver

b)

Pancreas

c)

Salivary glands

d)

Gall bladder

59.

Where is the bile released?

a)

Pancreas

b)

Liver

c)

Stomach

d)

Small intestine

e)

Mouth

60.

Where is the intestinal juice secreted?

a)

Small intestine

b)

Stomach

c)

Large intestine

d)

Pancreas

61.

What is the function of the villi?

a)

To increase the absorption surface

b)

To digest the last nutrients

c)

To form feces

d)

To comb the small intestine

62.

What is the function of the large intestine?

a)

The absorption of water and some vitamins, formation and storage of faeces

b)

The absorption of nutrients

c)

The digestion of fats

d)

Transport the nutrients to the blood stream

63.
The mouth has 2 different types of digestion.  They are
a)
Physical and Elemental
b)
Mechanical and heat
c)
Mechanical and chemical
d)
Acidic and motion
64.
Digestion starts in the 
a)
Mouth 
b)
Esophagus
c)
Stomach 
d)
Intestine
65.
Most mechanical digestion takes place in the 
a)
Stomach
b)
Mouth
c)
Small intestine
d)
Large intestine
66.
Salvia breaks down food using
a)
Mechanical digestion
b)
Acidic digestion
c)
Chemical digestion
d)
None of the above
67.
An example of mechanical digestion is 
a)
Digestive acids in the stomach breaking down food
b)
Teeth chomping food up into smaller pieces
c)
Salvia in the mouth making the food taste sweet
d)
The liver as it produces bile and breaks down fat particles
68.
Which organ absorbs most of the nutrients using small fingerlike structures called villi?
a)
Gall Bladder
b)
Pancreas
c)
Large Intestine
d)
Small Intestine
69.
Which organ absorbs water and is the last stage of the digestive process.
a)
Gall Bladder
b)
Pancreas
c)
Large Intestine
d)
Small Intestine
70.
The tube that connects the mouth to the stomach (number 2 in the diagram) is called the
a)
Epiglotis
b)
Esophagus
c)
Entry
d)
Elimination tube
71.
The function of the digestive system is
a)
Breakdown foods
b)
Absorb nutrients
c)
Eliminate waste
d)
All of the above
72.
The rectum holds and stores waste before it is eliminated.
a)
True
b)
False
73.
Number 1 is the 
a)
Mouth 
b)
Esophagus
c)
Pancreas
d)
Gall Bladder
74.

Which organ breaks down food mechanically and chemically and is labeled number 3 in the diagram?

a)

Liver

b)

Pancreas

c)

Gall Bladder

d)

Stomach

75.

What is the function of the digestive system?

a)

Breakdown food

b)

Absorb nutrients

c)

Eliminate waste

d)

All 3

76.

The large intestine is longer than the small intestine and that is how it gets its name.

a)

True

b)

False

77.

Chemical digestion starts in the mouth due to

a)

Chewing

b)

Saliva

c)

Air

d)

Chemical digestion does not happen in the mouth

78.

The tiny little structures that line the small intestine are called

a)

Fingers

b)

bile

c)

Acid

d)

Villi

79.

What is the largest organ in the body?

a)

Liver

b)

Gallbladder

c)

Pancreas

d)

Stomach

80.
What starts the process of chemical breakdown?
a)
Saliva
b)
Oxygen
c)
Hydrogen
81.
What pushes food from the mouth to the stomach?
a)
Stomach
b)
Gall bladder
c)
Esophagus
82.
What churns food and breaks it down further using strong acids?
a)
Stomach
b)
Salivary glands
c)
Liver
83.
Where does most digestion occur?
a)
Stomach
b)
Salivary gland
c)
Small intestine
84.
What produces chemicals that break down fats, starches and proteins?
a)
Pulmonary artery
b)
Pancreas
c)
Pituitary gland 
85.
What stores bile?
a)
Colon
b)
Gall Bladder
c)
Small Intestine
86.
What produces the bile used to break down fats?
a)
Liver
b)
Large Intestine
c)
Mouth
87.
What is an example of chemical breakdown?
a)
Chewing
b)
Saliva
c)
Peristalsis
88.
Which of these is a disorder of the Digestive system?
a)
Allergies
b)
Flu
c)
Ulcer
89.
What begins the process of mechanical breakdown?
a)
the mouth
b)
the esophagus
c)
the pancreas
90.
What begins the process of chemical breakdown?
a)
Liver
b)
Salivary glands
c)
Colon
91.
What absorbs water and minerals and holds waste?
a)
Large Intestine (Colon)
b)
Small Intestine
c)
Gall Bladder
92.
What is not a function of the digestive system?
a)
Create new foods
b)
Absorb water
c)
Process waste
93.
What is the Nephron?
a)
Causes buildup in the stomach acid
b)
Regulates the concentration of water and soluble substances by filtering the blood
c)
Creates muscular contractions to move the food
94.
What is the function of the Ureter?
a)
Carries urine from the kidney to the urinary bladder.
b)
Tiny finger-like projections in the Small Intestine
c)
Absorbs water and minerals and holds waste
95.
What is the function of the bladder?
a)
Push out excess waste
b)
Create and absorb excess waste to be regulated
c)
Collect urine from the kidneys before disposal by urination
96.
What is the urethra?
a)
The tube that allows urine to pass out of the body
b)
Collects urine from the kidneys
c)
Carries urine to the urinary bladder
97.
WHAT IS AFTER THE SMALL INTESTINE?
a)
Large intestine
b)
nothing
c)
liver
d)
pancreas
98.
Number 7 in the diagram represents the:
a)
Small intestine
b)
Liver
c)
Large intestine
d)
Gall Bladder
99.
Type of digestion in the stomach:
a)
Mechanical
b)
Chemical
c)
Both
100.
The chewing and grinding of food into smaller pieces is an example of...
a)
Mechanical Digestion
b)
Chemical Digestion
101.
Nutrients from digested food are absorbed in which digestive organ?
a)
Small Intestine
b)
Stomach
c)
Large Intestine
d)
Gallbladder
102.
Number 3 is pointing to the...
a)
Small intestine
b)
Rectum
c)
Large intestine
d)
Stomach
103.
Number 2 is pointing to the...
a)
Esophagus
b)
Stomach
c)
Small intestine
d)
Anus
104.
Which organ pushes food down to the stomach?
a)
Mouth
b)
Esophagus
c)
Rectum
d)
Large intestine
105.
Which body system gets ride of solid waste?
a)
Excretory (Urinary)
b)
Digestive
c)
Circulatory
d)
Respiratory
106.
As waste moves through the digestive system, the ______ absorbs water before storing waste in the rectum.
a)
Small intestine
b)
Stomach
c)
Esophagus
d)
Large intestine
107.
Gastric juices in the stomach digest food into a thick liquid.  This is...
a)
Mechanical digestion
b)
Chemical digestion
108.
Enzymes (chemicals) in your saliva help break down food while chewing.  This is...
a)
Mechanical digestion
b)
Chemical digestion
109.
Number 7 is pointing to...
a)
Mouth
b)
Esophagus
c)
Small intestine
d)
rectum
110.
Number 8 is pointing to the...
a)
small intestine
b)
stomach
c)
anus
d)
rectum
111.

Digestion starts in the ...

a)

stomach.

b)

esophagus.

c)

epiglottis

d)

mouth.

112.
During the production of yogurt, specific _______ are used to ferment the milk.  In turn the same  ______ are beneficial to our digestive system when we eat the yogurt.
a)
algae
b)
bacteria
c)
fungi
d)
protozoan
113.
The bacteria species E-coli is actually beneficial to humans.  It plays an important role in which body function?
a)
digestion
b)
excretion
c)
metabolism
d)
reproduction
114.
Bacteria are very small single-celled organisms that lack a nucleus.  Although bacterial cells are less complex than the cells that make up the human body, bacteria are very important to human health.  Which statement best summarizes how bacteria affect human health.
a)
Bacteria cause disease in humans.
b)
Bacteria are beneficial to humans.
c)
Bacteria rarely affect human cells because they are so much smaller.
d)
Some bacteria are beneficial to humans and some are harmful.
115.
Humans cannot digest food without the aid of small single-celled organisms that live in our digestive tract. Which common name is associated with these single-celled organisms that help humans digest food?
a)
algae
b)
bacteria
c)
protozoa
d)
virus
116.
Which organ is part of the digestive system?
a)
blood
b)
brain
c)
pancreas
d)
spleen
117.
Mouth to stomach to intestines.  What system helps the digestive system move food until it becomes waste?
a)
circulatory
b)
immune
c)
muscular
d)
skeletal
118.
What is the organ where water is absorbed from the digested food and returned to the bloodstream?
a)
mouth
b)
small intestine 
c)
esophagus
d)
large intestine
119.
Which organ is a secondary organ that stores bile?
a)
stomach
b)
gallbladder
c)
pancreas
d)
liver
120.
Which organ is made of three layers of muscles that continue mechanical digestion?
a)
stomach
b)
liver
c)
anus
d)
esophagus
121.
Which organ does most of the chemical digestion of food and allows nutrients to be absorbed into the body?
a)
stomach
b)
esophagus
c)
small intestine
d)
liver
122.
Digestion in animals begins in the ______.
a)
intestines
b)
mouth
c)
stomach
d)
throat
123.
Predict the next digestive system organ in the following sequence: mouth, pharynx, esophagus, stomach, ______
a)
liver
b)
kidneys
c)
small intestines
d)
large intestines
124.
We think of our muscular system as the system that helps us move around.  It also functions on an internal level by helping food movement in the _____ and _____, both parts of the digestive system.
a)
stomach; liver
b)
stomach; pancreas
c)
stomach: gallbladder
d)
stomach; small intestines
125.
What is the short tube that stores solid waste until it is eliminated from the body through the anus?
a)
rectum
b)
liver
c)
esophagus
d)
stomach
126.
Which secondary organ produces insulin and other digestive juices to further break down the food in the small intestines?
a)
liver
b)
gallbladder
c)
mouth
d)
pancreas
127.
Which type of digestion produces physical change to the food by breaking food into smaller pieces?
a)
chemical
b)
peristalsis
c)
mechanical
d)
saliva
128.
Which organ system includes the esophagus, pancreas, and large intestine?
a)
digestive
b)
excretory
c)
integumentary
d)
lymphatic
129.
When you eat a cheeseburger, your digestive _______ digests the cheeseburger.
a)
glands
b)
organ
c)
system
d)
tissue
130.
What stores bile?
a)
Colon
b)
Gall Bladder
c)
Small Intestine
131.
What is the definition for digestion?
a)
Breaking down food into smaller nutrients
b)
Getting rid of waste products
c)
Getting food into our bodies
d)
Getting nutrients into our bloodstream, so that our cells can use them
132.
The organ where food doesn't pass through but it does break down fats and detoxify poisons?
a)
liver
b)
small intestine
c)
stomach
d)
large intestine
133.
Enzymes and acids are examples of 
a)
mechanical digestion
b)
chemical digestion
134.
Chewing, grinding, and churning are examples of...
a)
mechanical digestion
b)
chemical digestion
135.
The muscular tube that moves food from the mouth to the stomach?
a)
esophagus
b)
small intestine
c)
stomach
d)
mouth
136.
What do the villi do?
a)
Digests food in the mouth.
b)
Digests food in the stomach
c)
Protects the stomach from digesting iteself
d)
Absorbs nutrients from food so the body has energy.
137.
a)
esophagus
b)
liver
c)
stomach
d)
pancreas
138.
a)
stomach
b)
pancreas
c)
large intestine
d)
small intestine
139.
A fluid in the mouth that helps digest food.
a)
pepsin
b)
pepsi
c)
saliva
d)
salty
140.
Provides additional enzymes(pancreatic juice) to help nutrients get absorbed by the small intestine.
a)
liver
b)
kidneys
c)
gall bladder
d)
pancreas
141.
The process by which the body breaks down food so that it can be used for energy.
a)
composition
b)
digestion
c)
deposition
d)
absorption
142.
Gastric juices in the stomach digest food into a thick liquid.  This is...
a)
Mechanical digestion
b)
Chemical digestion
143.
The chewing and grinding of food into smaller pieces is an example of...
a)
Mechanical Digestion
b)
Chemical Digestion
144.

Where does digestion begin?

a)

Our teeth

b)

Our stomach

c)

The esophogus

d)

Small intestines

145.

What comes first?

a)

Mouth

b)

stomach

c)

large intestine

d)

small intestine

146.

Number 4 is pointing to the....

a)

stomach

b)

Rectum

c)

Large Intestine

d)

Small intestine

147.

Number 5 is pointing to the...

a)

Liver

b)

mouth

c)

Pancreas

d)

Stomach

148.

A short tube at the end of the large intestine that stores solid waste is the...

a)

stomach

b)

rectum

c)

liver

149.
Enzymes (chemicals) in your saliva help break down food while chewing.  This is...
a)
Mechanical digestion
b)
Chemical digestion
150.
Gastric juices in the stomach digest food into a thick liquid.  This is...
a)
Mechanical digestion
b)
Chemical digestion
151.
Which is NOT a function of the Digestive System?
a)
To rid the body of solid waste
b)
Absorb nutrients for energy & growth
c)
Break down nutrients from food
d)
Pump blood around the body
152.
As waste moves through the digestive system, the ______ absorbs water before storing waste in the rectum.
a)
Small intestine
b)
Stomach
c)
Esophagus
d)
Large intestine
153.
Which organ pushes food down to the stomach?
a)
Mouth
b)
Esophagus
c)
Rectum
d)
Large intestine
154.
Number 2 is pointing to the...
a)
Esophagus
b)
Stomach
c)
Small intestine
d)
Anus
155.
Number 3 is pointing to the...
a)
Small intestine
b)
Rectum
c)
Large intestine
d)
Stomach
156.
Nutrients from digested food are absorbed in which digestive organ?
a)
Small Intestine
b)
Stomach
c)
Large Intestine
d)
Gallbladder
157.
Which digestive organ makes digestive juices to help the small intestine absorb nutrients?
a)
Liver
b)
Gallbladder
c)
Pancreas
d)
Esophagus
158.
Bile is made by which digestive organ?
a)
Gallbladder
b)
Stomach
c)
Rectum
d)
Liver
159.
The chewing and grinding of food into smaller pieces is an example of...
a)
Mechanical Digestion
b)
Chemical Digestion
160.
Which of the following are secondary organs of the digestive system? 
a)
liver, stomach, & esophagus
b)
pancreas, liver, and gall bladder
c)
liver, stomach, & intestines
d)
intestines, anus, and stomach
161.
Food does not pass through which of the following? 
a)
stomach
b)
liver
c)
esophagus
d)
mouth
162.
Which part carries food into your stomach?
a)
esophagus
b)
mouth
c)
trachea
d)
vessels
163.
Where does chemical and mechanical digestion take place?
a)
liver and gall bladder
b)
stomach and mouth
c)
mouth and esophagus
d)
intestines and rectum
164.
Where does most of the chemical digestion of food takes place?  Nutrients from food are also absorbed into the bloodstream here. 
a)
Large Intestines
b)
Small Intestines
c)
Gall Bladder
d)
Liver
165.
Which of the following is a short tube that stores solid waste?
a)
Anus
b)
Esophagus
c)
Trachea
d)
Rectum
166.
This part produces bile, which is used by the body to break up fat particles. 
a)
Gall Bladder
b)
Pancreas
c)
Liver
d)
Small Intestine
167.
This part stores bile produced by the liver. 
a)
Gall Bladder
b)
Pancreas
c)
Stomach
d)
Rectum
168.
This is an opening where solid waste is eliminated.
a)
small intestine
b)
large intestine
c)
anus
d)
rectum
169.

This produces digestive juices that help to further break down the food in the small Intestine. It also produces insulin.

a)

Stomach

b)

Liver

c)

Gall Bladder

d)

Pancreas

170.

What is a chemical produced by the liver used by the body to break up fat?

a)

Saliva

b)

Bile

c)

Stomach Acid

d)

Mucus

171.

Which 2 organs store solid waste then allow it to pass through and leave the body?

a)

Small and large intestine

b)

Rectum and Anus

c)

Stomach and Small Intestine

d)

Liver and Large Intestine

172.

Where does digestion begin?

a)

The mouth

b)

The stomach

c)

The liver

d)

The small intestine

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