L2 Blood

What is the largest component of blood?

• Red blood cells

• White blood cells

• Plasma

• Platelets

What is the function of a platelet?

• To carry O2

• To clot

• To prevent infection

• To carry C02

Which cells helps the immune system?

• Red

• White

• Mast

• Melanin

Which vessels are thick walled and have no valves?

• Arteries

• Veins

• Capillaries

What keeps the blood circulating?

• Heart

• Lungs

• Liver

• Kidneys

Which is the smallest blood vessel?

• Veins

• Arteries

• Capillaries

What is the main job of blood?

• Transport 02, C02, nutrients and hormones

• Transport lymph and waste

Which vessels have thin walls, valves and slow flow?

• Arteries

• Veins

• Capillaries

What is the reddening of the skin called?

• Erythema

• Burning

• Reaction

• Allergy

If the skin appears red and sweaty what is happening?

• Vasoconstriction

• Vasodilation