An artist's representation of what nerves and nerve bundles look like at the microscopic level. It also shows how the anatomy of a nerve allows it to transmit electrical signals and communicate with other neurons (nerves).

This video combines animation and real footage of the heart to demonstrate how the atrial, pulmonic, mitral, and tricuspid valves of the heart work. The coordinated opening and closing of these valves is what allows the heart to provide blood flow and pressure in one direction, toward the lungs and body.

In addition to showing how a myocardial infarction (heart attack) occurs, this narrated animation also shows how atherosclerosis is caused and how it can affect the coronary arteries.

Uterine fibroids are a common cause of pain, abnormal bleeding and problems with fertility in women. Traditionally uterine fibroids are removed through the abdomen; however in some cases, skin incisions can be avoided if the uterine fibroids can be removed through the vagina, as discussed in this narrated animation. The removal of uterine fibroids is called a myomectomy.