Cardiovascular Biology Flashcards
1
Q
What are the 3 layers in which the heart is divided?
A
- myocardium
- endocardium
- epicardium
2
Q
what does the pericardium release?
A
-pericardial fluid
3
Q
where does the blood in the superior vena cava come from?
A
blood from head and neck
4
Q
where does the blood from inferior vena cava come from?
A
blood from rest of the body.
5
Q
where does the blood in the coronary sinus come from?
A
- blood from heart muscle
- deoxygenated blood into right atrium
6
Q
what muscle keeps valves closed?
A
papillary muscles
7
Q
what is valve regurgitation?
A
blood leaks
valves can’t open or shut
8
Q
valve defects-stenosis?
A
- narrowing of valves
- not push out enough blood.
9
Q
what 2 parts is the autonomic nervous system split into?
A
- parasympathetic (resting,digesting)
- sympathetic (fright and flight)
10
Q
what is the difference between skeletal muscle fibres and cardiac fibres?
A
skeletal muscle fibres have several peripheral nuclei
