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Flashcards in internal heart Deck (10):
1

interatrial septa

seperate atria from eachother

2

interventricular septa

seperate ventricles from eachother

3

fibrous skeleton

anchors heart valves by forming supportive rings
electrical insulation between atria and ventricles, ensures muscle impulses are timed properly
provides rigid framework for attachment of cardiac muscle

4

heart valves

Right atrioventricular valve
Left atrioventricular valve
aortic semilunar vale (L side)
pulmonary semilunar valve (L side)

5

chordae tendiane and papillary muscles

prevent the valves from being pushed back to the atria

6

when bicupsid and tricupsid valves open

papillary muscles relaxed and chordae tendineae slack

7

when bicupsid and tricupsid valves closed

papillary muscles contracted and chordae tendineae taught

8

right atrium

receives deoxygenated blood from systemic circulation via 3 blood veseels( coronary sinus, SVC and IVC)
conveys blood intro right ventricle via tricupsid valve
contains SA and AV nodes

9

left atrum

receives oygenated blood from pulmonary circulation via 4 pulmonary veins
separted from left ventricle via bicupsid valve
auricle contains musculi pectinati
vale of foramen ovale

10

ventricular walls

left wall is thicker because of higher blood pressure
left undergoes contraction which pushes oxygenated blood into pulmonary trunk