1. What are the cell components found in blood?

red blood cells, white blood cells, and platelets

What is true of the function of red blood cells?

They carry oxygen to the body’s cells.

What is true of the respiratory system?

It transports oxygen to the air sacs in the lungs.

9. What is important about the size of capillaries?

so narrow that red cells move through them single file.

What is the function of plasma?

Plasma delivers materials to cells and carries wastes away.

How do the cilia in the respiratory system help keep you healthy?

They wave and help push dirty mucus out of the lungs.

What is the pathway inhaled air takes to reach the lungs?

nose, larynx, trachea, bronchi, bronchioles, air sacs

Which statement best describes capillaries?

Tiny blood vessels that bring gases from blood into cells.

How does food move from the mouth to the stomach?

Muscles in the esophagus push the food to the stomach.

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Duplicate of Science Chapter 3 Human Body

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Human Body Chapter 3

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Answers

1
1. What are the cell components found in blood?
platelets, plasma, and white blood cells
white blood cells, red blood cells, and plasma
red blood cells, platelets, and plasma
red blood cells, white blood cells, and platelets
2
What blood vessels surround the air sacs that make up lungs?
alveoli
vein
capillaries
arteries
3
Which part of the heart is the first to receive blood containing carbon dioxide?
right atrium
left atrium
left ventricle
right ventricle
4
What is true of the function of red blood cells?
They contain materials that form clots, which stop bleeding.
They carry digested food to cells throughout the body.
They carry oxygen to the body’s cells.
They protect the body from germs.
5
What happens in the air sacs in the lungs?
Waving cilia push mucus out of the lungs and into the throat
Gases are exchanged.
Vibrations of the structures over the larynx create sound.
Germs, and dust are trapped in mucus.
6
What organs remove wastes from your blood?
esophagus
small intestine
villi
kidneys
7
What is true of the respiratory system?
It transports oxygen to the air sacs in the lungs.
It helps the body get rid of food wastes and water.
It moves nutrients around the body.
It breaks down food that you eat.
8
9. What is important about the size of capillaries?
so narrow that blood cells cannot move through them.
thin so that they cannot transport nutrients.
so thin that materials cannot move between them and blood.
so narrow that red cells move through them single file.
9
What is the tube that carries food from the mouth to the stomach?
esophagus
intestine
epiglottis
throat
10
Which is a respiratory disease that can be caused by smoking?
tuberculosis
cold
influenza
lung cancer
11
Which body system is made up of the heart, blood vessels, and blood?
skeletal system
digestive system
circulatory system
vascular system
12
What is the function of plasma?
Plasma protects the body against germs
Plasma forms clots to stop bleeding.
Plasma delivers materials to cells and carries wastes away.
Plasma carries oxygen to body cells.
13
How do the cilia in the respiratory system help keep you healthy?
They wave and help push dirty mucus out of the lungs.
They cause coughing, which moves more mucus into the lungs.
They contract and increase lung space.
They cause bronchioles to narrow.
14
What is the pathway inhaled air takes to reach the lungs?
nose, air sacs, bronchioles, bronchi, trachea, larynx
nose, larynx, bronchi, trachea, air sacs, bronchioles
nose, larynx, trachea, bronchi, bronchioles, air sacs
nose, trachea, larynx, bronchioles, bronchi, air sacs
15
In the circulatory system, what structures prevent blood from flowing in the wrong direction?
valves
capillaries
arteries
veins
16
What body system filters blood and returns salt, water, and other nutrients to the blood?
respiratory system
cardiovascular system
urinary system
digestive system
17
What gas moves from inhaled air into the blood vessels in the lungs?
oxygen
carbon dioxide
water vapor
air
18
Which statement best describes capillaries?
Large blood vessels that carry blood toward the heart
Tiny blood vessels that bring gases from blood into cells.
Flaps in veins that keep blood flowing in one direction.
Large blood vessels that carry blood away from the heart.
19
How does food move from the mouth to the stomach?
Teeth thrust the food downward
Salivary glands in the mouth push the food.
It travels down the esophagus by gravity.
Muscles in the esophagus push the food to the stomach.
20
In the circulatory system, what kind of blood vessels always carries blood away from the heart?
veins
valves
capillaries
arteries

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