Thorax 4 heart valves and chambers Flashcards

1
Q

2 types of heart valves

A

atrioventricular valves

  • tri/bicuspid valves
  • between atrium and ventricles

pulmonary and aortic valves
-semilunar valves

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2
Q

Purpose of valves?

A

prevent backflow

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3
Q

Tri vs Bicuspid valves (atrioventricular valves)

A

Tricuspid - right
Bicuspid - left

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4
Q

Contained in AV valves

A

Cusps
Cords (cordea tendinae)
Papillary muscles (extension of wall)

cords attach cusps to papillary muscles

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5
Q

How to distinguish between pulmonary and aortic valves (semilunar valves)?

A

Aorta has coronary arteries arising from it

- otherwise look the same

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6
Q

Shape of semilunar valves

A

3 cusps

- looks like mercedes logo

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7
Q

Difference in muscle of posterior and anterior of the heart

A

posterior - rough

anterior - smooth

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8
Q

Portion between inter ventricular wall and papillary muscle in the right ventricle? (pulmonary valve)

A

moderator band

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9
Q

Wall between 2 atrias

A

interatrial septum

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10
Q

thumbprint looking structure on the right inter atrial wall?

A

fossa ovalis

  • during fetal development, allowed blood to pass from right to left atrium, bypassing non-functioning fetal lungs
  • “septum primum” acts as a valve, now a flap on the IVC, allows blood to travel right to fossa
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11
Q

Muscles in the atria

A

pectinate muscles

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12
Q

Opening of Coronary Sinus

A

Collects blood from heart muscle

- beside opening to IVC

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