As the title implies, this video describes how muscles work. It shows the anatomy of the muscle in relation to bone but also the structure of muscle at the microscopic level.

This animation shows the function of the main skeletal muscles in the body. At the microscopic level, artists have animated how actin and myosin, (two muscle proteins) interact to make muscles contract.

The narrator of this 2D animation describes how sebum is blocked in sebaceous glands associated with hairs and how this leads to whiteheads and blackheads. The common locations for acne are discussed as well as a overview of acne treatment options.

We look at our skin everyday, but what does the skin look like up close and just under the surface. This animation shows what the skin would look like under magnification. The narrator explains the various things found within the skin such as hair follicles and sensory nerve endings.