Blood and Blood vessels

Which of the following is not a part of circulatory system?

• Blood

• Blood vessels

• Nerves

• Heart

An average adult human has _____________ litres of blood.

• 1.5-2.5

• 2-3

• 4.5-5.5

• 5-6

Which of the following is not a component of blood?

• Plasma

• Red Blood Cells

• White Blood Cells

• Platelets

• Capillaries

Which of the following is not true for RBCs?

• They are produced in red bone marrow of bones.

• They are smaller than WBCs.

• They are fewer than WBCs.

• Their average life span is about 120 days.

Which of the following is incorrectly matched?

• Platelets - prevent blood clotting

• RBCs - transport oxygen from lungs to body parts

• WBCs - fight against germs that enter our body

Which of the following is true for arteries? (Select all correct options)

• carry blood from heart to body parts.

• superficial

• thick and elastic walls

• valves are present

• blood flows in them under high pressure

Which of the following is true for veins? (Select all correct options)

• carry deoxygenated blood (except pulmonary vein)

• superficial

• thin and less elastic walls

• valves are present

• blood flows in them under low pressure

Which of the following is true? (Select all correct options)

• All arteries carry oxygenated blood except pulmonary artery.

• All arteries carry deoxygenated blood except pulmonary artery.

• All veins carry oxygenated blood except pulmonary vein.

• All veins carry deoxygenated blood except pulmonary vein.

____________________ are extremely thin blood vessels which connect arteries to veins.

• Valves

• Capillaries

• Arteries

• Veins