Internal features of the heart Flashcards
What are the three superficial layers of the heart (blood vessel wall) from superficial to deep ?
-epicardium
-myocardium
-endocardium
What is cardiac muscle fibers of the heart purpose?
-keeps AV and semilinar vessels open
-provides attachment for valve leaflet
- electrically insulates ventricle and atria
-keeps muscle fibers anchored
what are the unique internal structures of the right atrium?
-right auricle
-sinus venarum
-crista terminalis
-interatrial septum
-fossa ovalis
What is the sinus Venarum?
thin wall on SVC and ICV
Crista terminalis ?
separation btw rough and smooth aspects of the right atrium
-opening of the coronary sinus
interatrial septum
partition btw right and left atrium
What are the unique features of the right ventricle?
-trabeculae carneae
-right AV valve (tricuspid)
-chordinae tendinae
-papillary muscles
-interventricular septum
-septomarginal trabecula (moderator band)
What do papillary muscles do?
- they contract before the actual myocardium contraction occurs
-CUSPS SHOULD NOT PROLAPSE
What is the moderator band?
-septomarginal trabecula
-in the right ventricle that provides electrical conduction system to the heart
The left atrium :
-forms base of the heart and paired pulmonary veins enter the atrium
-forms apex of heart
has the biscuspid valve (left AV valve)
what interior structure in the right ventricle conveys electrical conduction of the heart?
the moderator band (septomarginal trabecula)
The pulmonary valve is ? and the tricuspid valve is ?
pul. valve: right atrium
tri: right ventricle
What is the placenta’s role?
-maternal and fetal blood exchange nutrients w/in the placenta
-delviers O2 and removal of CO2
{communication in the umbilical vessels}
What is the connection that allows for oxygenated to the mom and baby?
-the umbilical cord
What makes up the umbilical cord?
-umbilical vein
-umbilical arteries
