The circulatory system

What is the main function of blood in the cardiovascular system?

• to transport oxygen only

• to transport substances like oxygen, nutrients and waste

• to carry heat

• to store vitamins

What is the role of the heart in the cardiovascular system?

• to filter blood

• to pump blood through blood vessels

• to transport oxygen

• to store nutrients

Which of the following is NOT a characteristic of arteries?

• carry blood away from the heart

• thick muscular walls

• large lumen

• high pressure blood flow

Which blood vessel carries deoxygenated blood from the heart?

• pulmonary vein

• pulmonary artery

What is the main function of the veins?

• to carry oxygenated blood away from the heart

• to carry blood to the heart

• to carry heat

• to enable gas exchange

What is a key characteristic of capillaries?

• thick muscular walls

• thick lumen

• once cell thick walls

• contain blood under high pressure

Where does gaseous exchange primarily take place in the body?

• arteries

• veins

• capillaries

• heart

What type of blood vessel is found in the lungs?

• arteries

• veins

• capillaries

• heart vessels

Which blood vessel has thick muscular walls?

• arteries

• veins

• capillaries

• none of the above

Which of the following blood vessels contains blood under low pressure?

• arteries

• veins

• capillaries

• none of the above