The circulatory system

Question 1

Blood vessels

Answer 1

A blood vessel is a tube like structure that transports blood around the body, there are 3 main types of blood vessels, veins, arteries, capillaries

Question 2

Lumen

Answer 2

Blood cells have hollow centres called lumen this is where the blood flows.

Question 3

Arteries

Answer 3

Arteries transport blood away from the heart
They have thick walls because blood flows through them at a higher pressure

Question 4

Capillaries

Answer 4

Small blood vessels that act as a network between arteries and veins delivering blood to organs

Question 5

Veins

Answer 5

Thin walls, carry blood to the heart at a lower pressure.
valves to stop blood flowing back from where it came

Question 6

Double circulatory system

Answer 6

Blood vessels are organised into the double circulatory system, where blood flows through two loops.

Question 7

Explain the loops in a double circulatory system

Answer 7

One loop carries oxygenated blood from the heart to all the organs
and the other carries deoxygenated blood away from the heart and to the lungs

Question 8

Name the 4 chambers of the heart

Answer 8

The left and right ventricles and the left and right atria