The lymphatic system keeps our tissues from retaining fluid and houses many of the key components of the immune system, like lymph nodes. Learn how this underappreciated body system is organized and how it functions.

This video shows a close up view of bone anatomy and how blood is delivered to bone.

This narrated animation explains how normal cells sometimes change and turn into cancer cells. It touches on some of the causes and the prevalence of cancer and cancer deaths in the population.

A physician explains coronary artery disease or CAD in this video. He covers the main type of damage that can occur to the coronary artery, namely atherosclerosis. The video also covers some of the serious consequences of CAD such as myocardial infarction (heart attack) and heart failure.