HN210 Lecture Notes - Lecture 9: Superior Vena Cava, Coronary Sinus, Upper Limb
Document Summary
The heart is pretty much in the middle of the chest. Considered left bc the apex of it is inferior & left some material is skewed to the left. 2 lobes on left (to compensate for heart being there) Underside of lungs is concave where diaphragm goes. Gravity aids in transfer of blood to r ventricls. Collects used blood from head & neck & upper limb. Collects used blood from gut & lower limb. Leave from aorta to feed heart blood. Left over from blood flow as a fetus. Tiny hole in it that goes directly into right atrium. 3 entry points into right atrium: superior vena cava, inferior vena cava, coronary sinus. Left ventricles have stronger walls than right ventricles. Right just has to get blood to lungs. Left has to get to whole body. Not due to greater volume, due to thicker walls in left. Constantly have same volume of blood in all parts of the heart.
