SC8 #4 Circulatory and Respiratory system

Question 0

What parts of the body does the circulatory system use?

Answer 0

Includes the heart, blood and blood vessels

Question 1

What does the circulatory system do?

Answer 1

Moves blood throughout the body and transports nutrients, dissolved gases and waste

Question 2

How much blood is in the human body?

Answer 2

4-5 litres

Question 3

What does blood do?

Answer 3

Transports oxygen, nutrients and water to cells.

Transports carbon dioxide and waste away from cells.

Question 4

What are the components of blood?

Answer 4

Plasma, red blood cells, white blood cells, and platelets

Question 5

What is plasma?

Answer 5

Contains proteins and minerals.
It is mostly water.
It has dissolved salts.
It is 55% of your blood.

Question 6

What are red blood cells and what do they do?

Answer 6

They make your blood look red and they carry oxygen and carbon dioxide

Question 7

What are white blood cells and what do they do?

Answer 7

The bone marrow is where they are produced. WBC fight infections

Question 8

What do platelets do?

Answer 8

Clots blood

Question 9

What are the 3 types of blood vessels?

Answer 9

Arteries, capillaries and veins

Question 10

What are arteries and what do they do?

Answer 10

They are thick-walked blood vessels that move oxygen-rich blood to all the cells.
They carry blood away from the heart.

Question 11

What are capillaries and what do they do?

Answer 11

They are very thin blood vessels that link arteries and veins.
Oxygen and carbon dioxide can diffuse in and out of cells through the capillaries.

Question 12

What are veins and what do they do?

Answer 12

They are thinner-walked blood vessels that bring blood back to the heart and lungs so that it can be enriched with oxygen.

They are “dirty blood” (contains carbon dioxide and other waste) or deoxygenated blood.

Valves prevent back flow of blood as it travels back to the heart.

Question 13

How does the blood travel through the heart?

Answer 13

1. Blood that is low in oxygen flows from veins into the right atrium.
2. The right atrium sends this blood to the right ventricle.
3. The right ventricle sends the blood to the two lungs so that it can be enriched with oxygen.
4. The oxygen-rich blood moves back from the lungs to the heart and enters the left atrium.
5. The left atrium sends the blood to the left ventricle.
6. The left ventricle sends oxygen-rich blood to the whole body through the arteries.

Question 14

What are the parts of the heart?

Answer 14

Right atrium, right ventricle, left atrium, left ventricle, pulmonary artery, pulmonary vein, aorta, capillaries and inferior & superior vena cava

Question 15

Where does gas exchange in the alveoli occur?

Answer 15

Where the alveoli, capillaries and blood vessels meet

Question 16

What happens in the gas exchange on alveoli?

Answer 16

Carbon dioxide leaves the alveoli and oxygen enters

Question 17

What are the two upper chambers of the heart?

Answer 17

Right atrium and left atrium

Question 18

Where does the left ventricle send oxygen-rich blood?

Answer 18

To the whole body through the arteries

Question 19

What are alveoli?

Answer 19

Thin-walled sacs of air