The heart Flashcards
1
Q
What system is the heart apart of ?
A
Circulatory
2
Q
System 1
A
Deoxygenated blood flows into right ventricle, pumps to lungs
3
Q
System 2
A
Oxygenated blood flows into left atrium than left ventricle, pumps around body
4
Q
DRARVL OLALVB
A
deoxygenated
Right atrium
right ventricle
Lungs
Oxygenated
Left atrium
Left Ventricle
Body
5
Q
Structure of heart
A
- muscular walls (strong heartbeat)
- Left ventricle is thicker because blood pumps round body
- 4 chambers
- valves (make blood does not flow back)
- coronary arteries cover heart to provide its own blood supply
6
Q
The 4 chambers are…
A
separate oxygenated and deoxygenated blood.
2 Atria above
2 Ventricles bellow
7
Q
Arteries
A
- Blood away from heart
- Layers of muscle makes walls stronger
- Elastic fibres allows stretch
- Allows high pressure by pumping the heart
8
Q
Veins
A
- Carry blood to heart
- The lumen is wide allows low pressure
- They have valves
9
Q
Capillaries
A
- Allow blood to flow close to cell
- One cell thick create short diffusion path
- Permeable walls so substance can move across
10
Q
Adrenaline
A
- hormone produced by adrenal glands above kidney
- fight or flight
- increase heart rate
- increase breathing rate
11
Q
Effectors of CHD
A
- Diet
- Smoking
- Stress
