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Anatomy Exam 3 > L21: Thoracic Cavity > Flashcards

L21: Thoracic Cavity Flashcards

1
Q

visceral pericardium

A

= epicardium

serous memb.

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2
Q

below epicardium

A

mesocardium

holds arterial and venous supplies

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3
Q

parietal pericardium

A

= endocardium
serous memb.
fused to fibrous pericardium

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4
Q

fibrous pericardium is fused to

A

central tendon of diaphragm
and
to sternum

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5
Q

transverse sinus

A

space between arterial and venous mesocardium

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6
Q

oblique sinus

A

space between right and left pulmonary veins

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7
Q

the apex of the heart is located ?

A

down and to the left

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8
Q

base projection of heart

A

level of costal 3

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9
Q

apex projection of heart

A

5th intercostal

8 cm left of sternum

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10
Q

the pericardium extends up to the ?

A

sternal angle

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11
Q

3 layers of the heart

A

epicardium
myocardium
endocardium

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12
Q

visceral layer of serous pericardium + subserous layer of CT

A

epicardium

Ct layer = mesocardium

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13
Q

layer of heart that is the thickest and contains the cardiac muscle tissue itself

A

myocardium

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14
Q

layer of heart containing endothelium

A

endocardium

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15
Q

what is the cardiac skeleton and its function?

A

4 interlocking fibrous rings

rigid attachments for cardiac muscle fibers and support for valves

holds heart and its vessels in place

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16
Q

the apex is formed of the

A

left ventricle

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17
Q

diaphragmatic surface of the heart

A

rests on the diaphragm

mostly left ventricle and small part of right

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18
Q

sternocostal surface of heart

A

faces anteriorly

mostly right ventricle

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19
Q

inferior margin of heart

A

intersection of diaphragmatic and sternocostal surfaces

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20
Q

blood supply to the heart is via

A

2 coronary arteries

that are direct and only branches off of the ascending aorta

21
Q

right coronary artery

A

travels to coronary sulcus
to diaphragmatic surface
anastomoses w/ left

22
Q

right coronary artery supplies

A

right atrium and ventricle

posterior half of interventricular septum

23
Q

branches of right coronary artery

A

art to SA node
art to AV node
right marginal art
post. interventricular art

24
Q

the posterior interventricular artery is the same as

A

posterior descending artery

PDA

25
Q

left coronary artery

A

passes between pul. trunk and left atrium

to anastomose w/ right

26
Q

left coronary artery supplies

A

left atrium and ventricle

anterior half of interventricular septum

27
Q

branches of left coronary artery

A

circumflex art
left marginal art
ant. interventricular art

28
Q

the anterior interventricular artery is the same as ?

A

left anterior descending

LAD

29
Q

venous drainage of the heart is thru

A

the coronary sinus

located in post. coronary sulcus

30
Q

the coronary sinus opens directly into the ____ and is a direct continuation of the ____

A

right atrium

great cardiac vein

31
Q

tributaries of the coronary sinus

A

great cardiac v
middle cardiac v
small cardiac v

32
Q

right atrium sub-chambers

A

main posterior cavity

anterior cavity

33
Q

sinus venarum

A

main posterior cavity of right atrium

34
Q

anterior cavity of right atrium

A

lined w/ pectinate muscles

auricle

35
Q

right ventricle

A

has trabeculae carnae
moderator band
chordae tendinea
papillary muscle

36
Q

septomarginal trabecula

A

the moderator band
conveys right branch of AV bundle

found in right ventricle

37
Q

right atrioventricular valve

A

tricuspid valve

38
Q

left atrium

A

small but thicker than right
posterior smooth portion – site for pul. vein entry

anterior portion – auricle w/ pectinate muscles

39
Q

left ventricle

A

trabeculae carnae - less coarse

2 large papillary muscles

40
Q

left atrioventricular valve

A

bicuspid or mitral valve

41
Q

the sinoatrial node receives direct stimulation from ?

A

sympathetic cardiac nerves and

vagus nerve

42
Q

the atrioventricular node is located ?

A

in interatrial septum near tricuspid valve

43
Q

only connection between myocardium of atria and ventricles

A

interventricular bundles

44
Q

purkinje fibers are embedded in?

A

myocardium of ventricles

45
Q

3 main branches of the aortic arch

A

brachiocephalic trunk
left common carotid
left subclavian

46
Q

branches of descending aorta

A

intercostal art
subcostal art
bronchial art
esophageal art

47
Q

the superior vena cava is formed by ? and receives blood from ?

A

joining of right and left brachiocephalic veins

receives azygos

48
Q

drainage of intercostal space 1

A

by supreme intercostal vein

emptying into brachiocephalic veins

Anatomy Exam 3 (10 decks)

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