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Cardiovascular anatomy workbook > Borders, Surfaces and Chambers of the Heart > Flashcards

Borders, Surfaces and Chambers of the Heart Flashcards

1
Q

what forms the superior border of the heart?

A

RA
LA
Great vessels = SVC, aorta, pulmonary trunkis.

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2
Q

what forms the inferior border of the heart?

A

2/3rd RV
1/3rd LV

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3
Q

what forms the right border of the heart?

A

RA

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4
Q

what forms the left border of the heart?

A

LV and apex

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5
Q

the sternocostal surface is formed from

A

RA
RV
LV

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6
Q

the diaphragmatic (inferior) surface is formed from

A

RV
LV

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7
Q

the posterior (base) surface is formed from

A

LA
part of RA

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8
Q

what are the 4 chambers of the heart?

A

RA
RV
LA
LV

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9
Q

what role do the auricles have in the adult?

A

increases the capacity of the atrium and increase the vol. of blood it can contain

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10
Q

The RA contains which internal structures? add the labels

A
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11
Q

what functiion does the foetal foramen ovale have?

A

allows blood to bypass the lungs, which cannot yet work until exposed to air

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12
Q

what is the function of musculi pectinati in the right atrium

A

act as a RA volume reserve during adverse loading conditions

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13
Q

the right ventricle contains which internal structures?

A
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14
Q

what is the function of the trabeculae carneae?

A

their contraction pulls on the chordae tendineae, preventing inversion of the mitral and tricuspid valves

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15
Q

what is the function of the septomarginal trabeculum (moderator band)?

A

part of electrical conduction system of the heart

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16
Q

why is the RV 3x thinner than the LV?

A

The RV only has to pump nlood to the lungs, the LV pumps blood around he body.

17
Q

how many papillary muscles are found in the RV?

A

three (matches no. cusps in tricuspid valve)

18
Q

describe the LA

A

small, smooth-walled chamber situated wholly posterosuperiorly and forming the base of the heart.
Immediately posterior to it lies the oesophagus. It recieves the right and left pairs of pulmonary veins containing oxygenated blood from the lungs.

19
Q

what internal structures does the LV contain?

A
20
Q

how many papillary muscles are found in the left ventricle?

A

two

Cardiovascular anatomy workbook (7 decks)

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