The Blood

Question 1

Name three things that blood plasma transports.

Answer 1

• Carbon dioxide to the lungs.
• Soluble products of digestion from the small intestine.
• Urea from the liver to the kidneys.

Question 2

What do RBC’s contain, and what do they use this for?

Answer 2

Haemoglobin, which is combined with oxygen to form oxyhaemoglobin in the lungs.

Question 3

What happens when oxyhaemoglobin reaches the organs?

Answer 3

It splits up back into haemoglobin and oxygen.

Question 4

What do WBC’s contain?

Answer 4

A nucleus.

Question 5

What do platelets do?

Answer 5

Help the blood to clot.

Question 6

What does blood-clotting involve?

Answer 6

• Blood clotting involves enzyme-controlled reactions.
• Fibrinogen changes to fibrin.
• Fibrin forms a network of fibres that trap blood cells.
• The clot dries and forms a scab.