Arteries And Veins

Question 1

What happens when the heart muscles contract?

Answer 1

They force the blood into your arteries

Question 2

Each ______ of the heart pumps blood along under ______ pressure.

Answer 2

Beat

High

Question 3

Describe the movement of blood within the arteries?

Answer 3

The artery walls are elastic and stretch to take the blood. Then they contract and bounce back to force the blood along. This bouncing back can be felt as a pulse as the blood flows through.

Question 4

How are veins formed?

Answer 4

Capillaries join up to eventually form veins.

Question 5

Difference between arteries and veins.

Answer 5

Veins are wider than arteries and have thinner walls. The pressure inside veins is much lower, so the blood flows much more slowly in them. The blood is often squeezed along by your muscles.

Question 6

What is the flow of your blood helped by?

Answer 6

Valves

Question 7

What are valves?

Answer 7

Valves are like double doors that will only open in one direction. If you try to go back in the other direction the doors won’t open. Valves stop your blood from flowing backwards.