What are the two structures of the right auricle?
Crista terminalis: boundary between the auricle and sinus
What is the opening between the right and left atrium that allows blood to bypass the pulmonary circulation to the non-functional lungs of the fetus?
What is it called after birth?
What is the opening between the atrium and the ventricle?
What vein empties into the right atrium or cranial vena cava?
Right azygous vein
What are the tendinous chords that extend from the cusps of the AV valve to the papillary muscles?
Component of the conduction system of the heart extending from the interventricular septal wall to the parietal wall
Trabeculations of the inner ventricular wall
Cone shaped portion of the right ventricle extending towards the pulmonary trunk
What is the name of the valve in between the ventricle and the pulmonary trunk?
Pulmonary semilunar valve
How many cusps are associated with the atrioventricular valves?
What is the name of the valve between the left ventricle and the aorta?
Aortic semilunar valve
What is the thin muscular partition between the right and left atria?
What is the purpose of the intervenous tubercle?
Diverts the blood from the caudal and cranial vena cava into the right atrium
What is the muscular partition between the right and left ventricles?
What are the two main surfaces of the heart?
Auricular surface: left side positioned in the animal, both auricles in view
Atrial surface: right side in the animal, right atrium is the prominent structure in this view
Encircles the base of the heart and located between the atria and ventricles
Where is the paraconal interventricular groove and what is found inside?
Adjacent to the conus arteriosus of the right ventricle
Paraconal interventricular branch of the left coronary artery and great cardiac vein are in this groove
Where is the subsinuosal interventricular groove and what is inside here?
Located on the caudodorsal surface of the heart
Left coronary artery inside on the dog and ox
Right coronary artery is inside as well as the left with the horse and pig
What is the ductus arteriosus?
Fetal structure that serves to shunt the blood from the pulmonary trunk to the aorta
What is the ligamentum arteriosum?
Fibrous remnant of the ductus arteriosus in the adult
What happens if the ligamentum arteriosum has a vascular ring anomaly?
Constrict the esophagus which could cause megaesophagus
Persistent right aortic arch
What is the nutritional blood supply to the heart?