WorksheetsExercises on lesson 4
Total questions: 55
Worksheet time: 28mins
The blood which carries the waste materials, enters each kidney through a large ..........
vein.
artery.
blood capillary.
ureter.
Urea is formed due to the breaking down of .......... inside the body cells.
carbohydrates
fats
acids
proteins
The tube which transports the urine from the bladder is the ..........
vein.
esophagus.
urethra.
artery.
The process of expelling urine from the body is called .......... process.
urination
respiration
digestion
sensation
Inside the mouth, food is softened by the help of a liquid contains enzyme that is produced from ..........
stomach.
esophagus.
small intestine.
salivary glands.
All body systems get their needed energy from the food we eat.
True
False
The simple substances must be converted into complex nutrients to be used by the body cells.
True
False
Digestion begins when the food enters esophagus.
True
False
Saliva is a liquid which is secreted by salivary glands inside your mouth.
True
False
The acid and enzymes which are secreted inside stomach lead to more breaking down of food.
True
False
Inside large intestine, enzymes which are secreted by gallbladder help in the chemical breakdown of food.
True
False
Absorption of digested food takes place in the small intestine.
True
False
The digested food enters the colon as a soupy mixture.
True
False
Colon absorbs most of water from the undigested food that leaves the body.
True
False
The feces leaves the body through a bony opening known as anus.
True
False
Circulatory system transports the digested food to different body organs.
True
False
All nutrients that are absorbed from small intestine are stored as fats inside the body.
True
False
Glycogen is converted into glucose and stored in liver and muscles.
True
False
When your body needs energy, liver and muscles convert glycogen into glucose again.
True
False
Excretion process is necessary to convert complex food into simpler substances.
True
False
If your body doesn't get rid of waste, you will be healthy.
True
False
The main waste materials which is expelled by respiratory system is the urea.
True
False
The two kidneys remove waste materials from the blood.
True
False
Nephron helps in the filtration of blood from urea.
True
False
Urine is expelled outside the body through urethra.
True
False
Blood cells and proteins are too small, so they can pass through the nephrons of kidneys.
True
False
The system which converts the complex food into simpler substances that the body can use to get energy.
Digestive system
Respiratory system
Nervous system
Circulatory system
The process of breaking down the complex food into simpler substances.
Digestion
Respiration
Photosynthesis
Excretion
Write the scientific term of each of the following: A liquid in your mouth contains an enzyme which helps in digestion process.
Saliva
Bile
Sweat
Urine
An organ in which absorption of nutrients occurs.
Small intestine
Stomach
Large intestine
Esophagus
The organ which absorbs most of water from the undigested food.
Large intestine
Small intestine
Stomach
Pancreas
The last part of large intestine that stores the feces until it leaves the body.
Rectum
Colon
Cecum
Appendix
A substance that is stored in liver and muscles, then converted into glucose when your body needs energy.
Glycogen
Insulin
Hemoglobin
Starch
It is a system that is responsible for removing the waste materials produced from cells.
Excretory system
Respiratory system
Digestive system
Circulatory system
Write the scientific term of each of the following: It is the process of removing the waste materials that are produced inside the body cells.
Excretion
Respiration
Photosynthesis
Digestion
The organ which helps in excretion of sweat through the pores that are found in it. (__________)
Skin
Liver
Kidney
Lungs
The system that is responsible for excretion of carbon dioxide gas. (__________)
Respiratory system
Digestive system
Nervous system
Circulatory system
It is a microscopic filter that is found in the two kidneys and filters the blood from waste materials. (__________)
Nephron
Alveolus
Neuron
Glomerulus
A substance which is formed due to the breakdown of proteins inside the body cells is:
Urea
Glucose
Starch
Oxygen
Write the scientific term of each of the following: It is the process of expelling urine from the body.
Urination
Defecation
Respiration
Digestion
Glands that produce a liquid in the mouth to soften food. (__________)
Salivary glands
Sweat glands
Thyroid glands
Sebaceous glands
Complete the following sentences: 1. The food we eat contains different nutrients such as ______________, ______________, and ______________.
carbohydrates, proteins, fats
vitamins, minerals, water
sugars, fibers, oils
enzymes, acids, salts
Complete the following sentences: 2. Your body cells can use simple substances that are converted from complex ______________ to get their needed ______________ to do their functions.
nutrients, energy
proteins, oxygen
vitamins, water
carbohydrates, minerals
Complete the following sentences: 3. The system which helps your teeth and jaw move to chew the food is the ______________ system.
muscular
digestive
respiratory
circulatory
Complete the following sentences: 4. Stomach contains an ______________ and some ______________ that lead to more food breakdown.
enzyme, acid
acid, water
enzyme, water
bacteria, acid
Complete the following sentences: 5. Inside small intestine, ______________ secretes enzymes and ______________ secretes juice to help in the chemical breakdown of food.
pancreas, liver
liver, pancreas
stomach, pancreas
pancreas, stomach
Complete the following sentences: 6. After completing the digestion of food, the wall of ______________ absorbs the nutrients through ______________ that carry them to all the body parts.
small intestine, blood vessels
large intestine, nerves
stomach, lymph vessels
esophagus, capillaries
Complete the following sentences: 7. Undigested food passes to ______________ intestine which absorbs most of ______________ from it, leaving the solid waste that is known as ______________ or ______________.
large, water, feces, stool
small, nutrients, urine, bile
large, nutrients, mucus, gas
small, water, blood, plasma
The muscular opening that the feces passes through it to outside the body is known as ______________.
anus
esophagus
urethra
trachea
Complete the following sentences: 9. Cells can use ______________ sugar at once to get their needed energy, and this sugar can be converted into ______________ and stored in liver and ______________.
glucose, glycogen, muscles
fructose, starch, bones
sucrose, cellulose, kidneys
lactose, protein, lungs
The body needs to convert complex food into simpler substances because:
it helps in easy absorption of nutrients.
it makes food taste better.
it increases the amount of food in the body.
it prevents the body from getting tired.
Saliva plays an important role in digestion of food inside the mouth because:
It contains enzymes that break down starch into simpler sugars.
It helps in the absorption of nutrients directly in the mouth.
It neutralizes stomach acids before food reaches the stomach.
It provides energy for chewing food.
Give reasons for: Stomach secretes a digestive fluid when the food reaches it.
Because digestive fluid helps break down food for absorption.
Because digestive fluid cools the stomach.
Because digestive fluid increases blood flow.
Because digestive fluid prevents hunger.
The wall of small intestine contains blood capillaries because:
they help in the absorption of digested food into the bloodstream.
they provide structural support to the intestine.
they aid in the movement of food along the intestine.
they secrete digestive enzymes.
Give reasons for: Undigested food becomes solid wastes inside the large intestine.
Because water is absorbed from undigested food, making it solid.
Because enzymes break down all food in the large intestine.
Because the large intestine adds nutrients to undigested food.
Because undigested food is digested in the large intestine.
