B3e-the Circulatory System Flashcards Preview

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Flashcards in B3e-the Circulatory System Deck (17)
1

What is the function of white blood cells?

Fight pathogens by
Consuming them
Producing antitoxins
Producing antibodies

2

What is the function of platelets?

Small fragments of cells that help blood clot

3

How is the structure of a red blood cell adapted to its function?

Bioconcave shape gives large surface area to volume ratio for absorbing and releasing oxygen

4

How does haemoglobin in red blood cells react with oxygen in the lungs?

In the lungs haemoglobin combines with oxygen to become oxyhaemoglobin
In body tissues the reverse happens to release oxygen to the cells

5

Where does blood travel?

Arteries
Veins
Capillaries

6

How do the parts of the circulatory system work together to bring about the transport of substances around the body?

Arteries transporting blood away from the heart
Veins transporting the blood to the heart
Capillaries exchanging materials with tissues

7

How does the structure of arteries relate to their function?

Thick muscular and elastic wall
Strong to carry blood under pressure

8

How does the structure of veins relate to their function?

Large lumen
Valves help keep blood flowing in right direction

9

How does the structure of capillaries relate to their function?

Small
Permeable walls means substances can diffuse in and out

10

What does the right side of the heart do?

Pumps blood to lungs

11

What does the left side of the heart do?

Pumps blood to rest of body

12

What do the left and right ventricles do?

Pumps blood

13

What do the left and right atria do?

Receive blood

14

What do the semilunar, tricuspid and bicuspid valves do?

Prevents backflow

15

Why does the left ventricle have a thicker muscle wall?

It needs more muscle to pump blood around the whole body

16

What are the advantages of a double circulatory system in mammals?

Blood can be pumped out around body at higher pressures
Greater rate of flow to tissues

17

What is the function of red blood cells?

Transport oxygen from lungs to all the cells in the body