The circulatory system in humans

1

Which part of the blood is responsible for transporting oxygen around the body?

2

Which of these is an adaptation of red blood cells to carry oxygen?

3

What two steps are taken by a phagocyte to destroy a microbial invader?

4

What is the function of platelets in the blood?

5

Which vessel returns blood from the body to the heart?

6

What is the function of valves in the circulatory system?

7

Which chamber of the heart contracts with the highest pressure?

8

The walls of which type of blood vessel are only one cell thick?

9

Which substance can build up in coronary arteries leading to heart disease?

10

Which treatment for heart disease involves the insertion of a small balloon into a blood vessel?