Cheat Sheet
Heart Basics:
Muscular organ pumping blood
Location: chest, slightly left
Size: fist-sized | Shape: cone
Chambers & Flow:
4 chambers: RA → RV → Lungs → LA → LV → Body
Chamber
Functions;
RA;
Receives blood from body
RV;
Pumps to lungs
LA;
Receives from lungs
LV;
Pumps to body (strongest)
Valves
Valve. Location. Function. Tricuspid. RA → RV.
Prevents backflow
Pulmonary. RV → Lungs. Prevents backflow
Mitral. LA → LV. Prevents backflow
Aortic. LV → Body. Prevents backflow
Heart Walls:
Epicardium: outer layer
Myocardium: muscle (pumps blood)
Endocardium: inner layer
Coronary Arteries;