Almost one fifth of your weight is in your skin, but why does it weigh so much? Viewers learn about the integumentary system and the many functions it performs constantly to keep them safe. Then, they answer multiple choice and...

Take an elevator down under the surface of the skin! Animations show that new skin cells are formed and the old ones are shed in the epidermis, how melanin provides color and nerves and blood vessels reside in the dermis, and what the...

Our skin is the first line of defense against insects, parasites, and other irritants. How do we defend it? Step inside the science of scratching with a video from an informative playlist. Topics include how itching evolved, what happens...

Aaah, winter ... chapped lips, rough hands, and flaky, itchy skin! When you apply your favorite moisturizing lotion, what does it actually do? Science scholars examine the types and functions of moisturizers through a video from the...

Though UV radiation can damage skin, it isn't all bad. The third installment in a six-part series allows the class to study the structure and function of skin. They learn about the different types of skin cancer and the SPF rating...

Let's get to the root of biology. A video describes the difference between monocot and dicot plants. Then it explains the three main types of tissues in plants and the cells within each of these tissues. 

Most of us have suffered an injury we'd prefer to forget, but lingering scars just won't let us. Watch this video to find out exactly what happens during the healing process that cuases these changes to skin and organ tissue.

Did you know that the biggest organ in the human body isn't the brain, the liver, or even the lungs? It's the skin. Follow along with this short video as it explores the structure of human skin and its amazing ability to...