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Worksheets

Human Body Systems

Total questions: 40

Worksheet time: 3hrs 20mins

Name
Class
Date
1.

The heart is the major organ of the circulatory system. Which part of the body is responsible for delivering de-oxygenated blood to the heart?

a)

arteries

b)

capillaries

c)

valves

d)

veins

2.

Most mechanical digestion takes place in the

a)

liver

b)

esophagus

c)

stomach

d)

small intestine

3.

The filtration of wastes takes place inside the kidneys in the

a)

ureters

b)

urethra

c)

urinary bladder

d)

nephrons

4.

Urine leaves the body through the

a)

ureter

b)

urethra

c)

bladder

d)

anus

5.

Peristalsis helps move nutrients through parts of the body by using wavelike contractions. In which system is the function used?

a)

circulatory

b)

digestive

c)

endocrine

d)

respiratory

6.

Which body system is modeled in the diagram?

a)

the digestive system

b)

the muscular system

c)

the reproductive system

d)

the circulatory system

7.

What part of the digestive system first causes chemical changes to food?

a)

teeth in the mouth

b)

enzymes in the stomach

c)

saliva in the mouth

d)

enzymes in the small intestine

8.

Each organ in the digestive system has a specific function. During digestion, food passes from the stomach into the small intestine. Which statement BEST describes what takes place in the small intestine?

a)

Nutrients are absorbed from the food.

b)

Wastes are prepared to pass out of the body.

c)

Food is churned with acid to break down proteins.

d)

Excess water is reabsorbed into the blood stream.

9.

Cells need nutrients for energy. Which system is responsible for breaking down food to provide cellular energy?

a)

digestive

b)

excretory

c)

circulatory

d)

respiratory

10.

Which microscopic blood vessels perform gas exchange in your tissues?

a)

arteries

b)

arterioles

c)

capillaries

d)

veins

11.

Which of the following indicates the correct representation of the levels of organization in living systems?

a)

ecosystems → organs → organisms → tissues → cells → organ systems

b)

tissues → cells → organ systems → organisms → organs → ecosystems

c)

organisms → tissues → organ systems → cells → organs → ecosystems

d)

cells → tissues → organs → organ systems → organisms → ecosystems

12.

Which of the follow organs is a tube that squeezes food down into the stomach?

a)

trachea

b)

esophagus

c)

epiglottis

d)

urethra

13.

Which of the following is a J-shaped muscular sac that digests food?

a)

bladder

b)

stomach

c)

epiglottis

d)

liver

14.

The digestive system is the body system that breaks apart the food we eat and transforms that into nutrients that our bodies can use.

a)

True

b)

False

15.

What is/are the primary organs of the excretory system that function in filtering the blood?

a)

kidneys

b)

ureters

c)

stomach

d)

bladder

16.

How do the respiratory system and circulatory system work together to sustain a living organism?

a)

The respiratory system breaks down food, and the circulatory system moves the energy molecules throughout the body.

b)

The respiratory system provides energy to the circulatory system, which makes cells that can be used to make new organisms.

c)

The respiratory system brings oxygen into the body, and the circulatory system moves the oxygen to cells throughout the body.

d)

The respiratory system sends chemical signals through the body that tell the circulatory system to remove wastes from the body.

17.

The body takes in nutrients from food through digestion. Which system works with the digestive system to rid the body of waste left over from the food?

a)

excretory

b)

reproductive

c)

respiratory

d)

skeletal

18.

Which body system is connected to the cardiovascular system by a network of veins used to bring blood back to the heart?

a)

muscular

b)

nervous

c)

skeletal

d)

circulatory

19.

Which best explains the relationship between the circulatory system and the excretory system?

a)

The circulatory system brings nutrients to the excretory system so sperm or eggs can be created.

b)

The circulatory system brings blood to the excretory system where it can be filtered and wastes can be removed.

c)

The circulatory system brings sugar to the excretory system where it can be broken down to release energy for the body to use.

d)

The circulatory system captures oxygen from the air and sends it to the excretory system where it is converted to carbon dioxide and eliminated from the body.

20.

Which term is described as body systems working together to regulate the internal environment?

a)

bioanalysis

b)

circulation

c)

homeostasis

d)

symbiosis

21.

Many industrial cities across the world suffer from smog pollution. Which body system will most likely be affected by repeated exposure to smog pollution?

a)

respiratory system

b)

digestive system

c)

nervous system

d)

excretory system

22.

Food is broken down by acids in the stomach, nutrients are absorbed into the bloodstream, and energy is supplied to cells throughout the body. What two human body systems work together to accomplish this process?

a)

digestive and circulatory systems

b)

respiratory and digestive systems

c)

respiratory and circulatory systems

d)

digestive and reproductive systems

23.

What is the primary function of the lungs?

a)

disposal of wastes

b)

exchange of gases

c)

circulation of blood

d)

movement of energy

24.

Which systems are most responsible for removing unwanted substances from the body?

a)

circulatory and digestive

b)

respiratory and excretory

c)

digestive and endocrine

d)

circulatory and muscular

25.

Which body system provides transportation of nutrients, gases, and waste materials throughout the body?

a)

circulatory

b)

digestive

c)

excretory

d)

respiratory

26.

Which systems are most important for the exchange of carbon dioxide and oxygen in the human body?

a)

digestive and nervous

b)

circulatory and nervous

c)

respiratory and digestive

d)

respiratory and circulatory

27.

Look at the diagram modeling a person’s lungs. What part do the alveoli play in the respiratory system?

a)

They store gases not needed by the body.

b)

They exchange gases with the circulatory system.

c)

They keep any gases from entering the bloodstream.

d)

They convert carbon dioxide to oxygen for use by cells.

28.

Which two systems work together to remove food waste from the body?

a)

circulatory and respiratory

b)

excretory and respiratory

c)

respiratory and digestive

d)

excretory and digestive

29.

Which body system provides transportation of nutrients, gases, and waste materials throughout the body?

a)

circulatory

b)

digestive

c)

excretory

d)

respiratory

30.

The respiratory system in the human body is shown in the diagram below. What is the main relationship between the trachea, bronchioles, and alveoli?

a)

They work together to transport nutrients.

b)

They work together to regulate body temperature.

c)

They work together to store fluids to prevent dehydration.

d)

They work together to maintain the oxygen level in the blood.

31.

What is the primary job of red blood cells?

a)

transport oxygen

b)

remove waste

c)

fight disease

d)

allow reproduction

32.

Which BEST describes how the human circulatory and respiratory systems interact?

a)

The heart removes waste built up in the lungs.

b)

Oxygen enters the bloodstream directly from the nose.

c)

Oxygen is transferred to the bloodstream as blood passes by the lungs.

d)

The heart pumps air into the blood through the lungs.

33.

Which organ system is responsible for the exchange of oxygen and carbon dioxide between the body and the environment?

a)

circulatory

b)

excretory

c)

immune

d)

respiratory

34.

The nose, mouth, and diaphragm are parts of which body system?

a)

digestive

b)

muscular

c)

circulatory

d)

respiratory

35.

Which organ is MOST responsible for oxygen entering the blood stream?

a)

nose

b)

trachea

c)

bronchi

d)

lungs

36.

In humans, digestion begins in the mouth. The complete process of digestion occurs with the help of many different parts of the body. Which term BEST identifies the parts of the body that carry out the function of digestion?

a)

an organ

b)

an organism

c)

a system

d)

a tissue

37.

In which of the following organs is an acid produced?

a)

esophagus

b)

large intestine

c)

small intestine

d)

stomach

38.

Which organ absorbs the nutrients from food?

a)

mouth

b)

small intestine

c)

large intestine

d)

stomach

39.

Billy drew a picture on the board of the digestive system. He told the class which organ removed most of the water from food. To which organ was he MOST likely referring?

a)

esophagus

b)

stomach

c)

small intestine

d)

large intestine

40.

The walls of an artery are thicker and more elastic than the walls of a vein. Why is it important for the walls of an artery to be thicker and more elastic?

a)

to reduce cholesterol levels in the blood

b)

to resist the higher pressure from the blood

c)

to stop the blood from going into the capillaries

d)

to prevent blood from flowing backward in the vessels