Valves of the Heart Flashcards

1
Q

Right atrio-ventricular (tricuspid) valves has

A

3-cusps (anterior, posterior, & septal or medial)

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2
Q

tricuspid) valve

The atrial surface of the cusps are

A

smooth

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3
Q

tricuspid) valve

ventricular surfaces give attachment to

A

the chordae tendineae.

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4
Q

(tricuspid) valve The base of each cusp is secured to

A

the fibrous ring that surrounds the atrioventricular orifice.

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5
Q

tricuspid) valve

fibrous ring helps to

A

maintain the shape of the opening

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6
Q

tricuspid) valve

Atrioventricular orifice

A

About one inch wide, admitting tips of 3 fingers

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7
Q

Pulmonary Valve Surrounded by

A

fibrous ring which gives attachment to the cusps of the pulmonary valve.

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8
Q

Pulmonary Valve is formed of

A

3 semilunar cusps (Rt, Lt, & anterior)

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9
Q

Pulmonary Valve اشي مميز

A

No chordae tendineae or papillary muscles are attached to these cusps

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10
Q

Pulmonary Valve the semilunar cusp function

A

After ventricular contraction, the recoil of
blood fills these pulmonary sinuses and forces the cusps closed. This prevents blood in the pulmonary trunk from refilling the right ventricle.

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11
Q

The open mouths of the cusps are directed

A

upward into the pulmonary trunk.

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12
Q

The free superior edge of each cusp has

A

Nodule of the semilunar cusp

Lunula of the semilunar cusp

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13
Q

Nodule of the semilunar cusp

A

Middle, thickened portion

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14
Q

Lunula of the semilunar cusp

A

A thin lateral portion

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15
Q

Basis for Naming Cusps of the Aortic and Pulmonary Valves

A

truncus arteriosus has four cusps →truncus arteriosus divides into two vessels, each with its own three-cusp valve (pulmonary and aortic)→The heart undergoes partial rotation so that its apex becomes directed to the left, resulting in the arrangement of cusps

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16
Q

Left atrioventricular orifice

A

Smaller than the right, admitting only tips

of 2 finger

17
Q

Left atrioventricular orifice Guarded by

A

mitral valve.

18
Q

Left atrioventricular orifice Surrounded by

A

fibrous ring which gives attachment to the cusps of mitral valve

19
Q

Mitral valve, which is also referred to as

A

the bicuspid valve

20
Q

Mitral valve is composed of

A

2 cusps

21
Q

2 cusps of Mitral valve

A

Anterior cusp

Posterior cusp:

22
Q

Anterior cusp of mitral valve lies

A

anteriorly and to right

23
Q

Posterior cusp of mitral valve lies

A

posteriorly and to left

24
Q

The atrial surfaces of the cusps

A

are smooth

25
Q

ventricular surfaces give attachment to

A

chordae tendineae

26
Q

Aortic orifice is surrounded by a

A

fibrous ring which gives attachment to the

cusps of aortic valve.

27
Q

Aortic valve is formed of

A

3 semilunar cusps (Rt, Lt, & posterior)

28
Q

position of the cusps of Aortic valve

A
  • One anterior cusp (Right cusp: Rt coronary artery arises from it).
  • 2 posterior cusps
    a. Left cusp: Lt coronary artery arises from it.
    b. Posterior cusp: noncoronary Cusp
29
Q

chordae tendineae when cusps of bicuspid is opened

A

slack

30
Q

chordae tendineae hen cusps of bicuspid is closed

A

taut

31
Q

papillary muscles hen cusps of bicuspid is opened

A

relaxed

32
Q

papillary muscles hen cusps of bicuspid is closed

A

contracted