Heart and Pericardium

Question 1

pericardium

Answer 1

fibroserous covering of the heart

Question 2

parietal serous pericardium

Answer 2

inner layer of pericardium; adheres to fibrous pericardium

Question 3

fibrous pericardium

Answer 3

middle layer of pericardium

Question 4

pericardial mediastinal pleura

Answer 4

outer layer of pericardium

Question 5

phrenicopericardial ligament

Answer 5

continuation of the fibrous pericardium to the sternum and diaphragm

Question 6

serous pericardium

Answer 6

a closed sac that envelops most of the heart

Question 7

epicardium

Answer 7

visceral layer

Question 8

pericardial cavity

Answer 8

between the parietal and visceral serous pericardium; contains a small amount of pericardial fluid

Question 9

auricular face

Answer 9

surface of the heart facing the left thoracic wall

Question 10

atrial surface

Answer 10

surface of the heart facing the right wall

Question 11

coronary sulcus

Answer 11

lies between the atria and ventricles; contains coronary vessels and fat

Question 12

interventricular sulci

Answer 12

superficial separations of the right and left ventricles

Question 13

paraconal interventricular sulcus

Answer 13

obliquely traverses the auricular surface of the heart; begins at the base of the pulmonary trunk; adjacent to the conus arteriosus; contains the paraconal interventricular branch of the left coronary artery

Question 14

subsinuosal interventricular sulcus

Answer 14

lies on the caudal aspect of the of the atrial surface ventral to the level of the coronary sinus that enters the right atrium; contains the terminal branch of the left coronary artery

Question 15

right atrium

Answer 15

receives blood from the systemic veins and most most of the blood from the heart itself

Question 16

sinus venarum

Answer 16

main part of the right atrium

Question 17

right auricle

Answer 17

blind cranial part of the right atrium

Question 18

coronary sinus

Answer 18

enlarged venous return for most of the blood from the heart

Question 19

right atrioventricular orifice

Answer 19

large opening from the right atrium to the right ventricle

Question 20

intervenous tubercle

Answer 20

a transverse ridge of tissue between the caval openings

Question 21

fossa ovalis

Answer 21

slitlike depression caudal to the intervenous tubercle; is the foramen ovale in the fetus

Question 22

right auricle

Answer 22

blind, ear-shaped pouch of the right atrium that faces cranially and to the left

Question 23

endocardium

Answer 23

thin, glistening membrane that lines the inside of the heart

Question 24

crista terminalis

Answer 24

smooth-surfaced, thich portion of the heart muscle shaped like a semilunar crest at the entrance of the auricle

Question 25

parietal cusp

Answer 25

a wide but short flap that arises from the parietal margin of the orifice of the atrioventricular valve

Question 26

septal cusp

Answer 26

flap from the septal margin of the atrioventricular valve; nearly as wide as it was long

Question 27

chordae tendinae

Answer 27

attached to the septal wall by papillary muscles

Question 28

papillary muscles

Answer 28

conical muscular projections

Question 29

trabeculae incarnae

Answer 29

muscular irregularities of the interior of the ventricular walls

Question 30

trabecula septomarginalis

Answer 30

muscular strand that extends across the lumen of the ventricle from the spetal to parietal wall

Question 31

conus arteriosus

Answer 31

funnel-shaped; gives rise to the pulmonary trunk

Question 32

pulmonary valve

Answer 32

consists of 3 semilunar valves

Question 33

left atrium

Answer 33

situated on the left dorsocaudal part of the base of the heart dorsal to the left ventricle

Question 34

valve of the foramen ovale

Answer 34

thin, concave fold of tissue present on the cranial part of the interarterial septal wall; remnant of the passageway for blood from the right atrium to the left atrium in the fetus

Question 35

ligamentum arteriosum

Answer 35

fibrous connection between the pulmonary trunk and the aorta just caudal to the left subclavian artery

Question 36

aortic valve

Answer 36

consists of 3 semilunar cusps

Question 37

right coronary artery

Answer 37

leaves the right sinus of the aorta; encircles the right side of the heart in the coronary groove and often extends into the subsinuosal interventricular groove; sends many small and a few large descending branches over the surface of the right ventricle

Question 38

left coronary artery

Answer 38

twice as large as the right

Question 39

circumflex branch

Answer 39

part of the left coronary artery; extends caudally in the left part of the coronary sulcus and supplies the subsinuosal interventricular branch

Question 40

paraconal interventricular branch

Answer 40

part of the left coronary artery; obliquely crosses the auricular surface of the heart in the paraconal interventricular sulcus

Question 41

septal branch

Answer 41

part of the left coronary artery; courses into the interventricular septum

Question 42

coronary sinus

Answer 42

dilated terminal end of the great cardiac vein

Question 43

great cardiac vein

Answer 43

begins in the paraconal interventricular sulcus; returns blood supplied to the heart by the left cofronary artery