9 Circulatory

What is the main component in human's blood?

• plasma

• red blood cells

• white blood cells

• platelets

Which of the following is used to carry oxygen?

• plasma

• red blood cells

• white blood cells

• platelets

Which of the following is used to destroy micro-organisms that cause infectious diseases?

• plasma

• red blood cells

• white blood cells

• platelets

Which of the following is used to seal a wound?

• plasma

• red blood cells

• white blood cells

• platelets

Which is not a description of red blood cells?

• biconcave shape

• no nucleus

• flat middle

• heal wound

Which is not a description for white blood cells?

• largest cell in blood

• contain haemoglobin

• colorless

• has a nucleus

Which is not being carried in plasma?

• glucose

• oxygen

• carbon dioxide

• urea

Oxygen and glucose use ______ to move from capillaries to body cells.

• osmosis

• diffusion

• transpiration

• peristalsis

Which of the following is not a blood disease?

• sickle-cell anaemia

• malaria

• sleeping sickness

• stroke

Sara has anaemia and which of the following can be observed from her blood smear?

• Lower red blood cells count

• Red blood cells look smaller

• Red blood cells look paler

• All options are correct