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

9. What is important about the size of capillaries?

so narrow that red cells move through them single file.

What is true of the respiratory system?

It transports oxygen to the air sacs in the lungs.

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.

What is the function of plasma?

Plasma delivers materials to cells and carries wastes away.

What is true of the function of red blood cells?

They carry oxygen to the body’s cells.

1. What are the cell components found in blood?

red blood cells, white blood cells, and platelets

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Science Chapter 3 Human Body

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Human Body Chapter 3

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Questions 20

Answers

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

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