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Flashcards in circulatory system Deck (10):
1

what is epicardium composed of?

-mesotheium ( simple squamus)
- loose areolar CT

2

what is endocardium made of?

-endothelial cells inner walls
- subendothelial cells w/ lots of elastic fibers (red)

3

where is the impulse-conductive system found?

in deepest layer of endocardium

4

what are the cardiac muscle cells embedded in?

in endomysium

5

are sattelite cells present in cardiac muscles?

NO, so no regeneration of injured myocytes

6

what are the three types of cells of the impulse-conducting system?

- p-cell ( 5-8 um) pacemaker
- transitional cells
- purkinje cell (subendocardial ventricular conducting cell)

they are lighter stained than working cardiac myocytes

7

what does the conductig cell contain making them more pale?

glycogen accumulations

8

what are the valves made of?

- dublications of endocardium
1. outermost: fibrosa
2. inner: spongiosa

9

what does mesothelium produce?

serous liquid

10

difference b/w spongiosa and fibrosa?

spongoisa: CT is loose collagenous w/ elastic fibers

fibrosa: CT densely collagenous