B2.2.2 - Circulatory System

Question 1

What is your circulatory system made up of?

Answer 1

Your heart and blood vessels

Question 2

What is it known as if blood remains with the heart and blood vessels?

Answer 2

The closed system

Question 3

What is blood good for?

Answer 3

Transporting substances around your body that need them

Carrying away waste products

Question 4

Give an example of a good substance blood carries around

Answer 4

Oxygen

Glucose

Question 5

Give an example of a waste product blood gets rid of.

Answer 5

Carbon dioxide

Question 6

How many times does blood flow through the heart during each circuit of the body?

Answer 6

Twice

Question 7

Why is it called the double circulatory system?

Answer 7

The blood flows through the heart twice every circuit

Question 8

What colour would you draw oxygenated blood?

Answer 8

Red

Question 9

What colour would you draw deoxygenated blood?

Answer 9

Blue

Question 10

Explain the process of the circulatory system.

Answer 10

Your heart pumps blood out to your organs and tissues. The oxygen and glucose in the blood diffuses into them, as the carbon dioxide diffuses out. The blood travels back to the heart, which pumps it to the lungs. In the lungs the carbon dioxide diffuse out of the body while new oxygen diffuses in. Cycle repeats.

Question 11

What are the 3 main types of blood vessels?

Answer 11

Arteries
Veins
Capillaries

Question 12

What do blood vessels do?

Answer 12

They are tubelike structures through which blood flows through

Question 13

What specific job do arteries do?

Answer 13

Carry blood away from the heart under high pressure

Question 14

What specific jobs do veins have?

Answer 14

Return blood to the heart, and stop blood from flowing the wrong way

Question 15

What feature do veins have that prevents blood from flowing the wrong way?

Answer 15

Valves

Question 16

What specific job does capillaries have?

Answer 16

Capillaries link arteries and veins in tissues and organs. They form a network so that every cell is close to a capillary.

Question 17

Describe the walls of a capillary.

Answer 17

One cell thick and semipermeable so that substances can easily move through them

Question 18

Describe the job of the artery.

Answer 18

Arteries carry blood away from the heart under high pressure. The walls are thick and muscular and expand with the force of each contraction. They then snap back (recoil) to push the blood forward.

Question 19

Why are thick vessel walls not required in veins and capillaries?

Answer 19

The pressure is very low

Question 20

Why is the double circulatory system beneficial?

Answer 20

The blood is under high pressure which is transports materials quicker around the body which is essential for a large organism.