THE CIRCULATORY SYSTEM:

Question 1

Blood:

Answer 1

is the fluid transported by the circulatory system, through the pumping action of the heart via the blood vessels, to every cell of the body

Question 2

Red blood cells:

Answer 2

transport of nutrients and oxygen to cells, and carbon dioxide and waste products from cells

Question 3

White blood cells:

Answer 3

move to sites of infection to destroy bacteria and disease causing organisms

Question 4

Plasma:

Answer 4

watery part of the blood in which other cells and substances are suspended

Question 5

Platelets:

Answer 5

responsible for blood clotting

Question 6

Functions of blood:

Answer 6

• Transport of nutrients, carbon dioxide and water: through the red blood cells
• Regulation of the body’s fluid content: through the passing of fluid from blood to body tissues (plasma)
• Regulation of the body’s temperature: redistributing blood to the internal organs or extremities
• Protection of the body: fighting bacteria (white blood cells) and clotting blood (platelets)

Question 7

Arteries:

Answer 7

• Carries blood away from the heart
• Blood flow is created by beating of the heart (pulse)
• Carries oxygenated blood barring the pulmonary artery

Question 8

Veins:

Answer 8

• Carry blood to the heart
• Blood flow is created by the contraction of muscles
• Valves are positioned at regular intervals
• Carries deoxygenated blood back to the heart barring the pulmonary vein

Question 9

Capillaries:

Answer 9

• Reach every cell of the body
• Have thin walls composed of a single layer of cells which allows for nutrients, like oxygen and carbon dioxide to pass in and out