Blood and muscles

The human heart has ____ chambers.

• 2

• 3

• 4

• 5

The heart pumps blood into ____

• Capillaries

• Arteries

• Veins

____ cells carry oxygen in blood.

• WBC

• RBC

• Platelets

The liquid content of blood is called

• Platelets

• Plasma

• RBC

• WBC

Haemoglobin carries _____

• Carbon dioxide

• nutrients

• oxygen

Blood vessels with very tiny walls which exchange nutrients and waste materials are called

• Arteries

• capillaries

• veins