Question 1

Which part of the heart receives oxygenated blood from the lungs?

Accepted Answer

Left atrium

Answer

Right atrium

Answer

Right ventricle

Answer

Left ventricle

Question 2

What is the main function of capillaries in the circulatory system?

Accepted Answer

Exchange nutrients and waste between blood and tissues

Answer

Pump blood throughout the body

Answer

Carry oxygenated blood away from the heart

Answer

Transport blood back to the heart

Question 3

Which component of blood is primarily responsible for clotting?

Accepted Answer

Platelets

Answer

Red blood cells

Answer

Plasma

Answer

White blood cells

Question 4

Where does carbon dioxide get removed from the bloodstream?

Accepted Answer

In the lungs

Answer

In the heart

Answer

In the kidneys

Answer

In the liver

Question 5

What type of blood vessel carries blood away from the heart?

Accepted Answer

Artery

Answer

Capillary

Answer

Vein

Answer

Venule

Question 6

What substance does the liver help remove from the bloodstream?

Accepted Answer

Urea

Answer

Glucose

Answer

Carbon dioxide

Answer

Oxygen

Question 7

Which part of the heart pumps oxygen-rich blood to the body?

Accepted Answer

Left ventricle

Answer

Left atrium

Answer

Right atrium

Answer

Right ventricle

Question 8

What is the primary function of red blood cells?

Accepted Answer

Transport oxygen to body tissues

Answer

Clot blood

Answer

Fight infections

Answer

Provide immune response

Question 9

What structure separates the left and right sides of the heart?

Accepted Answer

Septum

Answer

Coronary artery

Answer

Aorta

Answer

Valves

Question 10

Which type of blood vessel returns deoxygenated blood to the heart?

Accepted Answer

Vein

Answer

Aorta

Answer

Capillary

Answer

Artery

Question 11

What are the four chambers of the heart?

Accepted Answer

right atrium, right ventricle, left atrium, left ventricle

Answer

right ventricle, left ventricle, vena cava, pulmonary artery

Answer

right atrium, left atrium, aorta, pulmonary vein

Answer

left atrium, left ventricle, right atrium, coronary artery

Question 12

Where does oxygen enter the bloodstream?

Accepted Answer

in the alveoli of the lungs

Answer

in the capillaries of the intestines

Answer

in the left ventricle

Answer

in the right atrium

Question 13

What is the main function of veins in the circulatory system?

Accepted Answer

to carry deoxygenated blood back to the heart

Answer

to pump blood throughout the body

Answer

to carry oxygenated blood away from the heart

Answer

to exchange nutrients and waste

Question 14

Which component of blood is responsible for clotting?

Accepted Answer

platelet

Answer

red blood cell

Answer

plasma

Answer

white blood cell

Question 15

What is the primary role of capillaries in the circulatory system?

Accepted Answer

to facilitate the exchange of oxygen, carbon dioxide, and nutrients

Answer

to store blood cells

Answer

to carry blood away from the heart

Answer

to transport blood from the heart to the lungs

Question 16

Where are substances like carbon dioxide and urea added or removed from the bloodstream?

Accepted Answer

in the capillaries and the kidneys

Answer

in the heart and lungs

Answer

in the aorta and vena cava

Answer

in the stomach and intestines

Question 17

Which blood vessel carries oxygen-rich blood from the lungs to the heart?

Accepted Answer

pulmonary vein

Answer

pulmonary artery

Answer

aorta

Answer

vena cava

Question 18

What is the role of red blood cells in the circulatory system?

Accepted Answer

to transport oxygen throughout the body

Answer

to aid in blood clotting

Answer

to fight infections

Answer

to carry nutrients

Question 19

What part of the heart pumps deoxygenated blood to the lungs?

Accepted Answer

right ventricle

Answer

left ventricle

Answer

left atrium

Answer

right atrium

Question 20

What is the main function of the circulatory system?

Accepted Answer

to transport nutrients, gases, hormones, and waste products throughout the body

Answer

to exchange gases in the lungs

Answer

to digest food

Answer

to protect the body from infections

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