The Circulatory System

Artery walls are...

• Thick and elastic

• Thin

• Very thin, 1 single cell

The role of platelets is to...

• Transport oxygen to working muscles

• Defend the body against pathogens

• Create blood clots to stop bleeding

The function of the veins is to...

• Transport oxygenated blood AWAY the heart

• Transport deoxygenated blood INTO the heart

The only blood vessels to have valves to prevent blood from flowing backwards are...

• Capillaries

• Arteries

• Veins

Hemoglobin is found in the...

• White blood cells

• Plasma

• Red blood cells

The fluid part of the blood that allows substances to dissolve and be transported is the...

• Platelets

• Plasma

• Hemoglobin

The vessels with the narrowest lumen are the...

• Arteries

• Veins

• Capillaries

The vessels which have a very thin wall, only 1 cell thick are the...

• Capillaries

• Arteries

• Veins

The function of the white blood cells is to...

• Transport CO2 and other waste products

• Clump together to form blood clots

• Defend the body against pathogens

When hemoglobin is combined with oxygen it becomes...

• Hemoxobin

• Oxyhemoglobin

• Hemogloxygen