B2.2.2 - Circulatory System Flashcards

1
Q

What is your circulatory system made up of?

A

Your heart and blood vessels

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2
Q

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

A

The closed system

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3
Q

What is blood good for?

A

Transporting substances around your body that need them

Carrying away waste products

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4
Q

Give an example of a good substance blood carries around

A

Oxygen

Glucose

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5
Q

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

A

Carbon dioxide

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6
Q

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

A

Twice

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7
Q

Why is it called the double circulatory system?

A

The blood flows through the heart twice every circuit

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8
Q

What colour would you draw oxygenated blood?

A

Red

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9
Q

What colour would you draw deoxygenated blood?

A

Blue

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10
Q

Explain the process of the circulatory system.

A

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.

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11
Q

What are the 3 main types of blood vessels?

A

Arteries
Veins
Capillaries

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12
Q

What do blood vessels do?

A

They are tubelike structures through which blood flows through

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13
Q

What specific job do arteries do?

A

Carry blood away from the heart under high pressure

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14
Q

What specific jobs do veins have?

A

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

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15
Q

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

A

Valves

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16
Q

What specific job does capillaries have?

A

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

17
Q

Describe the walls of a capillary.

A

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

18
Q

Describe the job of the artery.

A

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.

19
Q

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

A

The pressure is very low

20
Q

Why is the double circulatory system beneficial?

A

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