Heart and Pericardium Flashcards
What is the path of the right coronary artery?
R. coronary branch leaves right sinus of the heart and just GOES AROUND coronary groove–> extends to subsinuosal interventricular groove
What is the path of the left coronary artery?
L. coronary branch–> L. sinus
- paraconal interventricular branch: crosses auricular surface obliquely
- circumflex branch of L. coronary artery (moves to the atrial surface)–> terminates in subsinuosal interventricular branch
phrenicopericardial ligament/sternopericardial ligament
continuation of fibrous pericardium to diaphragm
- phrenicopericardial ligament in the dog
- sternopericardial ligament in the horse and ox
Where is the azygous vein located in the canine, the equine,the pig and the ruminant?
Canine: right
Equine/carnivore: right
Pig: left
Ruminant: bilateral
What are the 4 openings in the right atrium?
(1) coronary sinus
(2) caudal vena cava
(3) cranial vena cava: azygous vein enters cranial vena cava
(4) atrioventricular orifice
right atrium has a main part (sinus) and a blind pouch (auricle)
What 4 structures are in the right/left atria?
(1) intervenous tubercle: diverts blood into the cranial and caudal vena cava into the right atrioventricular orifice
(2) fossa ovalis
(3) crista terminalis
(4) pectinate muscles
What 4 structures are in the right/left ventricles?
(1) chordae tendinae
(2) papillary muscles
(3) trabeculae carnae: sends blood to the lungs (in right ventricle)
(4) trabeculae septomarginalis: conductive tissue; from septal wall (left ventricle)
Which arteries/veins are located in the paraconal interventricular groove?
- great cardiac vein
- left coronary artery
Which arteries/veins are located in the subsinuosal interventricular groove?
-circumflex branch of the left coronary artery (extends from the left side of the coronary sulcus to supply the subsinuosal interventricular branch)
What does the ligamentum arteriosum do?
shunts blood from the pulmonary artery to the aorta
