Show that the quantization of angular momentumL nU follows from Bohrs Assumption D that themean value K of the kinetic energy of the electronnucleussystem is given by K nhforb/2. Assume a circularorbit.
Week 7 Lecture Notes Cardiac Physiology: The circulatory system has three main components: • The heart establishes a pressure gradient to pump the blood • The blood vessels are passageways for the distribution of pumped blood throughout the body. • The blood is a transport medium, serving the needs of body cells. – The pulmonary circulation is a loop of blood vessels between the heart and the lungs. – The systemic circulation is the circuit of blood vessels between the heart and other body systems. • Two systems: pulmonary and systemic • The human heart is about the size of a fist. • It is located in the chest cavity posterior to the breastbone in between the lungs and superior to the diaphragm. • It is the organ responsible for supplying blood and oxygen to the body. The heart wall consists of three layers. – The endocardium is the inner layer of epithelium. – The myocardium is the middle layer of cardiac muscle tissue. – The epicardium is the external membrane. • Cardiac muscle fibers are interconnected by intercalated discs. They form a functional syncytia. Exam 3, 4,5 we will need to know structure and function The heart is surrounded by a fluid filled sac (the pericardium). While the heart is relaxed, venous blood flows from the right atrium into the right ventricle through the open tricuspid valve. The right atrium then contracts and more blood flow