Understanding the Human Body: An Introduction to Anatomy and Physiology

This introductory lecture examines the anatomy of the fist-sized muscle that pumps blood through the body. We review the distinction between arteries and veins and discuss the location of the heart, its coverings, layers, and subdivisions.

In this lecture, we examine the functioning of the cardiac cycle. We also examine the functioning of the heart's conduction system, the functioning of the valves (which produce the heart's distinctive "lub-dub" sound), and possible complications, notably atherosclerosis.

This lecture examines the anatomy of the three vessel networks that circulate blood. We identify and describe the structure of the vessels that form these networks. Next, we examine the major circulatory routes for the blood: arterial and venous systemic circulation, pulmonary circulation, and hepatic portal circulation.

In this lecture, we examine the physiology of the large blood vessels—how they control blood flow, regulate blood pressure, and control bleeding when ruptured. We will also examine the composition of blood and the functions of each of its parts-plasma, white blood cells, and red blood cells.

This lecture examines the anatomy of the respiratory system. After studying the integration of the respiratory system with the circulatory system, we review the anatomy of the structures through which air enters the body and passes into the lungs.

We turn now to the physiology of the respiratory system. We examine the four areas where respiration occurs and the consequences of blocking this respiration. We review the physiology of the movement of gases into the lungs and of their exchange with waste gases. Finally, we turn to the central respiratory centers, and we examine some respiratory disorders and their treatments.