Unit 3– Cardiovascular system Flashcards
1
Q
Functions of circulatory system
A
- transports oxygen and nutrients
- temperature regulation
- protects body from infection and disease
2
Q
oxygenated blood
A
- carries nutrients
- rich in oxygen
3
Q
deoxygenated blood
A
- carries waste (CO2)
- low in oxygen
4
Q
haemoglobin
A
chemical responsible for transporting oxygen in the blood
5
Q
parts of double-circulatory system
A
- systematic circuit
- pulmonary circuit
6
Q
systematic circuit
A
- deoxygenated blood
- body to heart to lungs
7
Q
pulmonary circuit
A
- oxygenated blood
- lungs to heart to body
8
Q
plasma
A
- mainly made out of water to allow substances to dissolve and be transported easily
9
Q
red blood cells
A
contain haemoglobin that reacts with oxygen to create oxyhemoglobin
10
Q
white blood cells
A
defend body against pathogens by engulfing them or creating antibodies
11
Q
platelets
A
contain enzyme that causes blood to clot when there is damage to blood vessels / if they’re exposed to air
12
Q
components of blood
A
plasma, platelets, red blood cells, white blood cells
13
Q
artery
A
- narrow lumen
- high pressure
- thick muscular wall
- no valves
14
Q
vein
A
- wide lumen
- low pressure
- thin wall
- yes valves
15
Q
capillaries
A
- extremely narrow lumen
- low pressure
- very thin wall
- no valves
- as thin, oxygen and CO2 allowed to diffuse. Nutrients and O2 extracted from blood and left w/ CO2
