Thorax 4 heart valves and chambers Flashcards
2 types of heart valves
atrioventricular valves
- tri/bicuspid valves
- between atrium and ventricles
pulmonary and aortic valves
-semilunar valves
Purpose of valves?
prevent backflow
Tri vs Bicuspid valves (atrioventricular valves)
Tricuspid - right
Bicuspid - left
- try before you buy
Contained in AV valves
Cusps
Cords (cordea tendinae)
Papillary muscles (extension of wall)
cords attach cusps to papillary muscles
How to distinguish between pulmonary and aortic valves (semilunar valves)?
Aorta has coronary arteries arising from it
- otherwise look the same
Shape of semilunar valves
3 cusps
- looks like mercedes logo
Difference in muscle of posterior and anterior of the heart
posterior - rough
anterior - smooth
Portion between inter ventricular wall and papillary muscle in the right ventricle? (pulmonary valve)
moderator band
Wall between 2 atrias
interatrial septum
thumbprint looking structure on the right inter atrial wall?
fossa ovalis
- during fetal development, allowed blood to pass from right to left atrium, bypassing non-functioning fetal lungs
- “septum primum” acts as a valve, now a flap on the IVC, allows blood to travel right to fossa
Muscles in the atria
pectinate muscles
Opening of Coronary Sinus
Collects blood from heart muscle
- beside opening to IVC