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Question 1

What is the job of the cardiovascular system?

Answer 1

To supply food, water, and oxygen to the body’s cells and remove wastes.

Special delivery. To survive, your body’s cells must have food, water, and oxygen supplied and wastes removed.

Question 2

What does the term ‘cardiovascular’ refer to?

Answer 2

It refers to the heart, blood, and blood vessels.

The word cardiovascular describes the body parts through which blood travels-cardio- refers to the heart, and vascular refers to the blood vessels.

Question 3

What is the main component of blood?

Answer 3

Plasma, which makes up over 50% of blood.

Over 50% of your blood consists of the straw-colored liquid called plasma.

Question 4

What do red blood cells transport?

Answer 4

Oxygen to the other cells of the body on a special protein called hemoglobin.

In one drop of blood, there are millions of red blood cells, which transport oxygen to the other cells of the body on a special protein called hemoglobin.

Question 5

What do platelets in the blood do?

Answer 5

Form clots and seal up cuts.

Platelets in the blood are cell pieces that form clots and seal up cuts.

Question 6

What does the cardiovascular system transport?

Answer 6

Oxygen, microorganism-fighting cells, nutrients, and hormones.

The blood in your cardiovascular system carries oxygen from the respiratory system, microorganism-fighting cells from your lymphatic system, nutrients from the digestive system, and hormones from your endocrine system.

Question 7

How does the exchange of oxygen, nutrients, and wastes occur between blood and the body’s cells?

Answer 7

In the tiny capillaries by diffusion.

The exchange of oxygen, nutrients, and wastes between blood and your body’s cells occurs in the tiny capillaries by diffusion-the mixing of gas or liquid molecules by random molecular motion.

Question 8

What is the job of the cardiovascular system?

Answer 8

To supply food, water, and oxygen to the body’s cells and remove wastes.

Special delivery. To survive, your body’s cells must have food, water, and oxygen supplied and wastes removed.

Question 9

What does the term ‘cardiovascular’ refer to?

Answer 9

It refers to the heart, blood, and blood vessels.

The word cardiovascular describes the body parts through which blood travels-cardio- refers to the heart, and vascular refers to the blood vessels.

Question 10

What is the main component of blood?

Answer 10

Plasma, which makes up over 50% of blood.

Over 50% of your blood consists of the straw-colored liquid called plasma.

Question 11

What do red blood cells transport?

Answer 11

Oxygen to the other cells of the body on a special protein called hemoglobin.

In one drop of blood, there are millions of red blood cells, which transport oxygen to the other cells of the body on a special protein called hemoglobin.

Question 12

What do platelets in the blood do?

Answer 12

Form clots and seal up cuts.

Platelets in the blood are cell pieces that form clots and seal up cuts.

Question 13

What does the cardiovascular system transport?

Answer 13

Oxygen, microorganism-fighting cells, nutrients, and hormones.

The blood in your cardiovascular system carries oxygen from the respiratory system, microorganism-fighting cells from your lymphatic system, nutrients from the digestive system, and hormones from your endocrine system.

Question 14

How does the exchange of oxygen, nutrients, and wastes occur between blood and the body’s cells?

Answer 14

In the tiny capillaries by diffusion.

The exchange of oxygen, nutrients, and wastes between blood and your body’s cells occurs in the tiny capillaries by diffusion-the mixing of gas or liquid molecules by random molecular motion.

Question 15

What do capillaries merge to form?

Answer 15

Venules

Venules are similar to arterioles; however, they carry blood from capillary networks to veins-large blood vessels that carry blood back to the heart.

Question 16

How does blood move through veins?

Answer 16

With help from the muscular system, and special valves within the veins that allow the blood to move in only one direction.

The combination of muscle movement and one-way valves forces the blood to return to the heart.

Question 17

What separates the two halves of the heart?

Answer 17

The septum

The two halves of the heart are separated by a wall called the septum.

Question 18

What is the body’s largest artery?

Answer 18

Aorta

The left ventricle pumps blood into the rest of the body through the aorta, the body’s largest artery.

Question 19

What is the function of pulmonary circulation?

Answer 19

Transports the blood back and forth between the lungs and the heart.

Example sentence: Blood leaves the heart through the pulmonary arteries and returns through the pulmonary veins.

Question 20

What is systemic circulation?

Answer 20

The flow of blood between the heart and all of the body except the lungs.

Example sentence: The blood flow to the heart tissues is a special branch of systemic circulation called coronary circulation.

Question 21

What is the function of coronary circulation?

Answer 21

Provides the large amounts of oxygen and nutrients necessary to keep the heart pumping.

Example sentence: The blood travels to the heart tissues through the coronary arteries, which branch off the aorta, and return to the right atrium through the cardiac veins.

Question 22

What is the major function of the respiratory system?

Answer 22

To exchange oxygen from the air with carbon dioxide from the blood.

Example sentence: Other functions include sneezing, coughing, and talking.

Question 23

What is the function of the nasal cavity?

Answer 23

To warm, moisten, and filter the air.

Example sentence: The mucous membrane lining the nasal cavity secretes sticky mucus that traps dust particles and other foreign substances found in the air.