The Circulatory System 1

Question 1

What is the circulatory system an example of

Answer 1

Organ system

Question 2

What is the role of the circulatory system

Answer 2

Transport nutrients and oxygen to our bodies tissues

Question 3

What is the circulatory system made up of

Answer 3

Heart,blood and blood vessels

Question 4

What do human have

Answer 4

A double circulatory system- two circuits joined together

Question 5

What is the role of the right ventricle

Answer 5

Pumps deoxygenated blood, to the lungs to take in oxygen. The blood then returns to the heart

Question 6

What is the role of the left ventricle

Answer 6

Pumps oxygenated blood around all the other organs in the body. The blood gives up its oxygen at body cells. And Deoxygenated blood returns to the heart to be pumped out of the lungs again.

Question 7

What 2 top chamber of the heart called

Answer 7

Right atrium left atrium

Question 8

What are the two bottom chambers of the heart called

Answer 8

The right ventricle and left ventricle

Question 9

On each side of the heart what separates the atrium and the ventricle

Answer 9

Valves- they prevents the blood from flowing backwards

Question 10

Where does the blood flow into the heart

Answer 10

Vena cava and pulmonary vein

Question 11

How does oxygenated blood enter the left atrium

Answer 11

Oxygenated blood from the lungs enter the left atrium through the pulmonary vein

Question 12

Where is the blood from the vena cava coming from

Answer 12

The blood is returning from the loop and around the body and is deoxygenated

Question 13

What is the journey of blood around the body

Answer 13

Body tissue- vena cava- right atrium- right ventricle- pulmonary artery- lungs- pulmonary vein- left atrium- left ventricle- aorta- body tissues

Question 14

Which blood vessel carries oxygenated blood from the heat to the body

Answer 14

Aorta

Question 15

What is the role and structure of the arteries

Answer 15

Pump blood out of the heart at high pressure, so the artery walls are strong and elastic.
They have a thick layer of muscle tissue and thick layer of elastic so they can stretch and spring back easily
The walls are thick compared to the lumen which is the whole in the middle

Question 16

What is the role of the capillaries

Answer 16

Capillaries are tiny
They come in close contact with the cells in our body to exchange substances and provide useful products like nutrients and oxygen
They take away waste products like carbon dioxide
They have a permable wall so substances can diffuse easily through them
They have a small lumen
There walls are usually only one wall thick so increases the rate of diffusion by decreasing the distance by which it occurs

Question 17

What is the role and structure of the vein

Answer 17

The vein are relatively large
They have the biggest lumen to help blood flow despite the low the pressure
The blood pressure is low so there walls dont need to be as thick
They have valves to prevent the blood from flowing backwards