Circulatory System Flashcards
1
Q
Major components
A
Heart
Blood vessels
Blood
2
Q
Role
A
- transports
- regulates internal temp
3
Q
What is the heart?
A
- Muscular organ
- Continuously pumping
- Generates blood flow
4
Q
What are blood vessels
A
System of hollow tubes which blood moves in
5
Q
What is blood
A
- fluid
- transports nutrients, oxygen, carbon dioxide and other materials
6
Q
Three types of blood vessels
A
Arteries, veins and capillaries
7
Q
Arteries
A
- elastic
- takes blood away from hearts
- carries oxygenated blood
- blood enters at high pressure
- thick walls
- no valves
- strong pulse
8
Q
Veins
A
- walls are one cell thick
- fed by arteries at one end and feeds vein at other end
- thin walls
- no valves
- walls are semi-permeable
9
Q
Capillaries
A
- carries deoxygenated blood
- takes blood to heart
- works under low pressure
- has valves
- less elastic
- no pulse
- tiny internal diameter
10
Q
Max heart rate
A
Usually 220 minus age
11
Q
How long can someone exercise over 85% HR?
A
3 mins
12
Q
Cardiac output
A
- volume of blood pumped per minute by each ventricle of the heart
- equal to the stroke volume times the heart rate
13
Q
Stroke volume
A
Volume of blood pumped from one ventricle of the heart with each beat
14
Q
Heart rate
A
Someones pulse and is the rate at which the heart beats
