Heart and Blood

Question 1

What organ system does your heart belong to?

Answer 1

The circulatory system

Question 2

How does the circulatory system work?

Answer 2

1) Your heart pumps blood into your lungs where it picks up oxygen
2) The (oxygenated) blood travels back to your heart
3) The heart gives it a second push which sends it all around the body into different organs and tissues
4) The blood travels back to the heart and the system restarts

Question 3

What are the names of the different parts of the heart?

Answer 3

Aorta, pulmonary vein, left atrium, left ventricle, right atrium, right ventricle, vena cava and pulmonary artery

Question 4

What side of the heart deals with oxygenated blood and what side deals with deoxygenated blood?

Answer 4

Oxygenated = Left
Deoxygenated = Right

Question 5

Do humans have a singular or double circulatory system?

Answer 5

Double

Question 6

How does the double circulatory system work?

Answer 6

Because humans have a double circulatory system, the blood actually passes through the heart twice per loop. It goes from the heart to the lungs, then back to the heart and then to the rest of the body before going back to the heart

Question 7

What is the job of blood?

Answer 7

To transport materials and heat around the body and to help protect us against disease

Question 8

What makes up blood?

Answer 8

1) Plasma
2) Red blood cells
3) White blood cells
4) Platelets

Question 9

What is plasma?

Answer 9

1) a straw coloured liquid
2) mainly water
3) transports carbon dioxide, digested food, urea, hormones and heat

Question 10

What are red blood cells?

Answer 10

1) contain haemoglobin (a red protein that combines with oxygen)
2) they have no nucleus
3) small and flexible so they can fit through narrow vessels
4) their job is to transport oxygen

Question 11

What are white blood cells?

Answer 11

1) they’re larger than red blood cells
2) have a nucleus
3) can change shape
4) defend the body by fighting germs that cause disease
5) produce antibodies

Question 12

What are platelets?

Answer 12

1) involved in blood clotting and scab formation to stop bleeding if your skin is cut

Question 13

What are the three types of blood vessels?

Answer 13

Arteries, veins and capillaries

Question 14

What is the job of the arteries?

Answer 14

To carry blood away from the heart straight after it’s been pumped

Question 15

What is the job of the veins?

Answer 15

To carry blood back to the heart

Question 16

What is the job of the capillaries?

Answer 16

To provide and take away substances from your cells