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Biology > Heart > Flashcards

Flashcards in Heart Deck (26)
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1
Q

What is blood made of?

A

⭐️Red blood cells
⭐️White blood cells
⭐️Platelets
⭐️Plasma

2
Q

How are red blood cells adapted for its function?

A

⭐️It has a biconcave shape which gives it a larger surface area for absorbing oxygen.

3
Q

describe the function of ventricles?

A

they pump the blood out of the heart that comes from the atrium

4
Q

what are the functions of the valves in the heart?

A

to prevent the backward flow of blood

5
Q

name two substances that defuse through capillary walls?

A

oxygen

carbon dioxide

6
Q

describe the role of arteries and veins

A

The arteries have to be able to cope with a lot of pressure when they take blood away from the heart
The veins carry blood to the heart and have valves to stop the blood flowing backwards

7
Q

explain how the structure of a capillary is adapted for its function?

A

capillaries structure is adapted to its function because it has tiny vessels and they are only one cell thick. they also take blood to individual cells. they are also made of very small lumen. they have thin walls to allow oxygen to diffuse in a short diffusion distance through its walls

8
Q

which blood vessel goes to the body?

A

aorta

9
Q

which blood vessel returns from the body?

A

vena cava

10
Q

which blood vessel goes to the lungs?

A

pulmonary artery

11
Q

which blood vessel returns from the lungs?

A

pulmonary vein

12
Q

how adrenaline effects the heart…

A
  • released by adrenal glands
  • binds to receptors in the heart
  • heart rate and force of contraction increase
  • increase oxygen supply
13
Q

what is coronary heart disease?

A

the build up of fatty acid substances such as cholesterol in the arteries can cause a blockage

14
Q

what is the effect of coronary heart disease?

A

this reduces the amount of oxygen and glucose reaching the cardiac muscle CAUSING A HEART ATTACK!!

15
Q

factors that affect coronary heart disease…

A
  • genetics
  • diet
  • lack of exercise
  • high blood pressure
  • smoking
  • stress
16
Q

where does the coronary arteries deliver blood too?

A

the heart

17
Q

what is the heart made of?

A

muscle

18
Q

whats on the outside of the heart?

A

coronary muscle

19
Q

how many ‘tubes’ go in and out?

A

4

20
Q

inside, how many chamber are there?

A

4

21
Q

what are the names of the 2 types of chamber?

A

atria and ventricles

22
Q

which one is at the top?

A

atria

23
Q

which ones at the bottom?

A

ventricles

24
Q

what is the main difference between the wall of the left side of the heart and the wall of the right side of the heart?

A

the left side’s thicker

25
Q

what is there in-between the different chambers of the heart?

A

valves

26
Q

what is the general name of the ‘tubes’ that go in and out?

A

blood vessels