The Heart

Question 1

smooth ridge demarcating the boundary between the auricle and the sinus venarum cavarum

Answer 1

crista terminalis

Question 2

The portion of the right atrium into which the cranial and caudal venae cavae empty

Answer 2

sinus venarum cavarum

Question 3

an opening between the right and left atria that allows blood to bypass pulmonary circulation to the non-functional lungs of the fetus

What is it called after it closes?

Answer 3

foramen ovale

fossa ovalis

Question 4

___________ of the AV valve (originates from outer, or marginal, ventricular wall)

___________ of the AV valve (originates from the interventricular septal wall)

Answer 4

parietal cusp

septal cusp

Question 5

this vein may empty directly into the right atrium or into the cranial vena cava

Answer 5

azygos vein

Question 6

tendinous chords that extend from the cusps of the AV valve to the papillary muscles

Answer 6

chordae tendineae

Question 7

extends from the interventricular septal wall to the parietal (marginal) wall of the ventricle; component of the conduction system of the heart

Answer 7

trabeculae septomarginalis

Question 8

“folds” of the inner ventricular wall

Answer 8

trabeculae carneae

Question 9

portion of the right ventricle that extends craniodorsally toward the pulmonary trunk

Answer 9

conus arteriosus

Question 10

two origins of the left and right coronary arteries

Answer 10

aortic sinuses

Question 11

located on the right side of the septum; transverse ridge of tissue between the two venae cavae

Answer 11

intervenous tubercle

Question 12

encircles the base of the heart and is located between the atria and ventricles

Answer 12

coronary groove

Question 13

the paraconal interventricular branch of the_______________ and the _______________ are located within the paraconal interventricular groove

Answer 13

left coronary artery

great cardiac vein

Question 14

the subsinuosal interventricular branch of the __________ branch of the _______________ is located within this groove (dog, ox)

Answer 14

circumflex

left coronary artery

Question 15

fetal structure that serves to shunt the blood from the pulmonary trunk to the aorta

Answer 15

Ductus arteriosus

Question 16

fibrous remnant of the ductus arteriosus in the adult;

may constrict the esophagus if there is a vascular ring anomaly

Answer 16

Ligamentum arteriosum

Question 17

the right coronary artery encircles the right side of the heart in the ______________ and extends to the __________ surface

Answer 17

coronary groove

caudodorsal

Question 18

the left coronary artery immediately branches into the _________________ and the ________________

Answer 18

paraconal interventricular branch

circumflex branch

Question 19

the _______________ begins in the paraconal interventricular sulcus and returns blood supplied to the heart by the left coronary artery

Answer 19

great cardiac vein