L21: Thoracic Cavity

Question 1

visceral pericardium

Answer 1

= epicardium

serous memb.

Question 2

below epicardium

Answer 2

mesocardium

holds arterial and venous supplies

Question 3

parietal pericardium

Answer 3

= endocardium
serous memb.
fused to fibrous pericardium

Question 4

fibrous pericardium is fused to

Answer 4

central tendon of diaphragm
and
to sternum

Question 5

transverse sinus

Answer 5

space between arterial and venous mesocardium

Question 6

oblique sinus

Answer 6

space between right and left pulmonary veins

Question 7

the apex of the heart is located ?

Answer 7

down and to the left

Question 8

base projection of heart

Answer 8

level of costal 3

Question 9

apex projection of heart

Answer 9

5th intercostal

8 cm left of sternum

Question 10

the pericardium extends up to the ?

Answer 10

sternal angle

Question 11

3 layers of the heart

Answer 11

epicardium
myocardium
endocardium

Question 12

visceral layer of serous pericardium + subserous layer of CT

Answer 12

epicardium

Ct layer = mesocardium

Question 13

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

Answer 13

myocardium

Question 14

layer of heart containing endothelium

Answer 14

endocardium

Question 15

what is the cardiac skeleton and its function?

Answer 15

4 interlocking fibrous rings

rigid attachments for cardiac muscle fibers and support for valves

holds heart and its vessels in place

Question 16

the apex is formed of the

Answer 16

left ventricle

Question 17

diaphragmatic surface of the heart

Answer 17

rests on the diaphragm

mostly left ventricle and small part of right

Question 18

sternocostal surface of heart

Answer 18

faces anteriorly

mostly right ventricle

Question 19

inferior margin of heart

Answer 19

intersection of diaphragmatic and sternocostal surfaces

Question 20

blood supply to the heart is via

Answer 20

2 coronary arteries

that are direct and only branches off of the ascending aorta

Question 21

right coronary artery

Answer 21

travels to coronary sulcus
to diaphragmatic surface
anastomoses w/ left

Question 22

right coronary artery supplies

Answer 22

right atrium and ventricle

posterior half of interventricular septum

Question 23

branches of right coronary artery

Answer 23

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

Question 24

the posterior interventricular artery is the same as

Answer 24

posterior descending artery

PDA

Question 25

left coronary artery

Answer 25

passes between pul. trunk and left atrium to anastomose w/ right

Question 26

left coronary artery supplies

Answer 26

left atrium and ventricle | anterior half of interventricular septum

Question 27

branches of left coronary artery

Answer 27

circumflex art left marginal art ant. interventricular art

Question 28

the anterior interventricular artery is the same as ?

Answer 28

left anterior descending | LAD

Question 29

venous drainage of the heart is thru

Answer 29

the coronary sinus located in post. coronary sulcus

Question 30

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

Answer 30

right atrium great cardiac vein

Question 31

tributaries of the coronary sinus

Answer 31

great cardiac v middle cardiac v small cardiac v

Question 32

right atrium sub-chambers

Answer 32

main posterior cavity | anterior cavity

Question 33

sinus venarum

Answer 33

main posterior cavity of right atrium

Question 34

anterior cavity of right atrium

Answer 34

lined w/ pectinate muscles | auricle

Question 35

right ventricle

Answer 35

has trabeculae carnae moderator band chordae tendinea papillary muscle

Question 36

septomarginal trabecula

Answer 36

the moderator band conveys right branch of AV bundle found in right ventricle

Question 37

right atrioventricular valve

Answer 37

tricuspid valve

Question 38

left atrium

Answer 38

small but thicker than right posterior smooth portion -- site for pul. vein entry anterior portion -- auricle w/ pectinate muscles

Question 39

left ventricle

Answer 39

trabeculae carnae - less coarse | 2 large papillary muscles

Question 40

left atrioventricular valve

Answer 40

bicuspid or mitral valve

Question 41

the sinoatrial node receives direct stimulation from ?

Answer 41

sympathetic cardiac nerves and | vagus nerve

Question 42

the atrioventricular node is located ?

Answer 42

in interatrial septum near tricuspid valve

Question 43

only connection between myocardium of atria and ventricles

Answer 43

interventricular bundles

Question 44

purkinje fibers are embedded in?

Answer 44

myocardium of ventricles

Question 45

3 main branches of the aortic arch

Answer 45

brachiocephalic trunk left common carotid left subclavian

Question 46

branches of descending aorta

Answer 46

intercostal art subcostal art bronchial art esophageal art

Question 47

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

Answer 47

joining of right and left brachiocephalic veins receives azygos

Question 48

drainage of intercostal space 1

Answer 48

by supreme intercostal vein emptying into brachiocephalic veins