1
diagonal groove is located between the walls of two lower heart chambers
2
composed of thin walled bags that hang from the wall of the vessel
3
veins that communicate with the atria
4
left AV valve
5
endotelial lining of the heart chambers
6
thick walled lower chambers
7
muscular lawyer of the heart wall
8
beamlike inner of the myocardium
9
flaplike outpouchings of the left and right atria
10
four chambered hollow organ composed of cardiac muscle tissue
11
largest artery of the body ,form and arch above the heart
12
lower point of tne heart
