The Circulatory System

Question 1

What is the main function of the circulatory system?

Answer 1

To transport nutrients, gases, hormones, blood cells, and waste products throughout the body.

Question 2

True or False: The circulatory system is also known as the cardiovascular system.

Answer 2

True

Question 3

What are the two main components of the circulatory system?

Answer 3

The heart and blood vessels.

Question 4

Fill in the blank: The heart has _____ chambers.

Answer 4

four

Question 5

What are the names of the four chambers of the heart?

Answer 5

Right atrium, right ventricle, left atrium, left ventricle.

Question 6

What is the role of the right side of the heart?

Answer 6

To pump deoxygenated blood to the lungs.

Question 7

What is the role of the left side of the heart?

Answer 7

To pump oxygenated blood to the rest of the body.

Question 8

Which blood vessels carry oxygenated blood away from the heart?

Answer 8

Arteries.

Question 9

Which blood vessels carry deoxygenated blood back to the heart?

Answer 9

Veins.

Question 10

What is the largest artery in the body?

Answer 10

The aorta.

Question 11

True or False: Capillaries are the smallest blood vessels.

Answer 11

True

Question 12

What is the function of capillaries?

Answer 12

To facilitate the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and tissues.

Question 13

What is blood pressure?

Answer 13

The force of circulating blood on the walls of blood vessels.

Question 14

What is the normal range for adult blood pressure?

Answer 14

120/80 mmHg.

Question 15

What is the function of red blood cells?

Answer 15

To carry oxygen from the lungs to the body’s tissues and transport carbon dioxide from the tissues back to the lungs.

Question 16

What is the role of white blood cells?

Answer 16

To fight infections and protect the body against foreign invaders.

Question 17

What component of blood is responsible for blood clotting?

Answer 17

Platelets.

Question 18

What is plasma?

Answer 18

The liquid component of blood that carries cells, nutrients, hormones, and waste products.

Question 19

What are the two main circuits of the circulatory system?

Answer 19

The pulmonary circuit and the systemic circuit.

Question 20

What does the pulmonary circuit do?

Answer 20

Carries deoxygenated blood from the heart to the lungs and returns oxygenated blood to the heart.

Question 21

What does the systemic circuit do?

Answer 21

Carries oxygenated blood from the heart to the rest of the body and returns deoxygenated blood to the heart.

Question 22

True or False: The heart is a muscle.

Answer 22

True

Question 23

What is the function of the heart valves?

Answer 23

To prevent the backflow of blood and ensure it flows in one direction.

Question 24

What are the names of the heart valves?

Answer 24

Tricuspid valve, pulmonary valve, mitral valve, aortic valve.

Question 25

What is the sinoatrial (SA) node?

Answer 25

The natural pacemaker of the heart that initiates the heartbeat.

Question 26

What is cardiac output?

Answer 26

The volume of blood the heart pumps per minute.

Question 27

What factors can affect heart rate?

Answer 27

Exercise, stress, hormones, and overall health.

Question 28

What is an electrocardiogram (ECG or EKG)?

Answer 28

A test that measures the electrical activity of the heart.

Question 29

What is atherosclerosis?

Answer 29

A condition where arteries become narrowed and hardened due to plaque buildup.

Question 30

What is hypertension?

Answer 30

High blood pressure.

Question 31

What lifestyle changes can improve circulatory health?

Answer 31

Regular exercise, a balanced diet, maintaining a healthy weight, and avoiding smoking.

Question 32

What is the function of the lymphatic system in relation to the circulatory system?

Answer 32

To help maintain fluid balance and assist in immune function.

Question 33

Fill in the blank: The circulatory system is essential for _____ and _____ exchange.

Answer 33

gas, nutrient