4.3 Circulation

How are substances transported around the body?

What is the heart?

How many chambers does the heart have? Give the names of these chambers

What are artificial pacemakers?

How is the natural resting heart rate controlled?

What happens to the heart if you have coronary heart disease?

In some people heart valves may become faulty. What are the two main faults?

What can be used to replace faulty heart valves?

Why might artificial hearts be occasionally used?

Explain what happens to blood in the heart

How does blood flow from the heart to the organs?

What are the two separate circulations for?

Name the blood vessels associated with the heart

What are the walls of an artery like?

What are the walls of veins like?

What are the walls of capillaries like?

What is blood?

What does blood plasma transport?

Explain the structure of red blood cells and what is inside them

What does haemoglobin do?

Do white blood cells have a nucleus?

What do white blood cells do?

What are platelets?

What happens during blood clotting?

What are antigens?

What happens in an organ transplant?

Why might the recipient's antibodies attack the antigens on the donor organ?

What can you do to prevent rejection of the transplanted organ?

What are the advantages of treating organ failure by mechanical devices or transplant?

What are the disadvantages of treating organ failure by mechanical devices or transplant?

What are the four main types of human blood?

Which blood group is the universal donor?

What is the need for blood typing?

Which antigens are present in which red blood cells?

Which antibodies are present in which red blood cells?

Which red blood cells are compatible with each other?