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Gross Anatomy One > Anterior and Middle Mediastinum > Flashcards

Anterior and Middle Mediastinum Flashcards

1
Q

where does the right phrenic nerve go in relation to the heart

A

associate with the pericardium over the right atrium

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2
Q

where does the left phrenic nerve go in relation to the hear

A

associates with the pericardium over the left atrium and ventricle

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3
Q

what is fibrous pericardium

A

though connective tissue sac

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4
Q

what does the fibrous pericardium blend with superiorly

A

tunica adventitia of the great vessles

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5
Q

what is the fibrous pericardium also continuous with

A

central tendon of the diapghram

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6
Q

what forms the pericardial sac

A

fibrous pericardium

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7
Q

what are the order of the seroud pericardium

A

fibrous, parietal and visceral (epicardium)

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8
Q

what is relfected over the great vessels

A

fibrous pericardium as the epicardium

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9
Q

what is the pericardial cavity

A

space between the two layersof serous pericardium

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10
Q

what does fluid produced by the serous pericardium allow

A

help lubricate the movement of the heart

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11
Q

what is the msucle layer of the heart

A

myocardium

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12
Q

what is the linning of the chmabers of the heart called

A

endocardium

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13
Q

what is the base of the heart comprised moslty of

A

left atrium

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14
Q

what runs posterior to the ligamentum arteriosum

A

left recurrent laryngeal nerve

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15
Q

what does the SA nodal branch supply

A

sinautrial node within the wall of the right atrium

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16
Q

what does the small branches of the right coronary artery supply

A

small AV nodal branch to supply the AV node

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17
Q

what is another name for the branches of the anterioer interventricular artery

A

diagonal artery

18
Q

what does the left main coronary artery supply

A

blood to the left side of the heart muscle
part of the right ventricle
AV bundle
IV septum

19
Q

what does the right coronary artery supply

A

Right atrium and most of the Right ventircle
SA and AV node
IV septum
L ventricel

20
Q

what most of the veisn drain to before returning to the right atirum

A

coronary sinus

21
Q

what drains direlcty into the chmaber

A

anterior cardiac vien

22
Q

what seperates the sinus venorum and the muscular wall of the right atrium

A

crista terminalis

23
Q

what is the small thumb shaped depression on the left and right atrium

A

fossa ovalis

24
Q

what is the fossa ovalis

A

remnant of the embryological foramen ovale (that allowed communication between the left and right atrium)

25
Q

what is musculi pectinati

A

intenral muscular ridges generally on the anterolaterla surface of the chambers

26
Q

what is the function of musculi pectinati

A

increase power without increasing heart mass

27
Q

what is the smooth part of the right atrium

A

sinus venorum

28
Q

what is the moderator band

A

unquie to the R ventricle
will carry part of the conducting system of the heart

29
Q

what are the muscular ridges of right ventricle called

A

traceulae carnae

30
Q

where are semilunar valves

A

pulmonary trunk and aorta

31
Q

Where are cuspid valves found

A

atria and ventricle

32
Q

what pressure is needed to close a semilunar and a cuspid

A

Semilunar - low pressure
cuspid - high

33
Q

what is the function of the fibrous skeleton

A

provide support for the cuspid valve and the carnets
act as insulation

34
Q

where is the SA node locatedq

A

the sinoatrial node is located in the upper part of the crista terminalis adjacent to the entry of the superior vena cava

35
Q

what does the SNA node cause a contraction

A

Signals from the sinoatrial node will pass through the wall of the right atrium and extend into the wall of the left atrium, causing the atria to contract at the same time

36
Q

how does the AT node send a singal down

A

The atrioventricular node is responsible for transmitting the signal from the SA node down to the ventricles, and it will do this via the atrial ventricular bundle which divides into right and left bundle branche

37
Q

where is the atrioventricular node located

A

lower part of the interatrial septum

38
Q

why does the singal travel to the moderator band

A

ensure the anterior papillary muscle and the anterior part of the wall on the right ventricle contract at the same time

39
Q

what do theassay nodes also get

A

autonomic supply via the cardiac plexus

40
Q

what is vagus nerve transmitted via

A

intrinstic ganglia

41
Q

what spinal level will ti travel via

A

T1 to T5-6 via cervical and superioer throacic

Gross Anatomy One (9 decks)

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