2. This is a picture of a break in the epidermis. The epidermis consists of avascular stratified squamous tissue strengthened by keratin, a tough, waterproof protein. The top layers are dead and called the Stratum Corneum You can see the blood vessels of the dermis. You can tell the cut goes to the dermis level of the skin because the epidermis is avascular and would not bleed if cut.

3. This is a picture of facial hair. The hair starts as cuboidal cells and then as the cells move up the hair bulb they die and are filled with keratin, a tough protein, and various amounts of melanin to give hair it’s color. The hair then extends out of the epidermis and it nourished by sebum (oil) released by the sebaceous gland

4. This is a picture showing the finger print. The undulations from the dermal papillae create the visible ridges in the epidermis. These ridges provide friction with other surfaces and allow the fingertips to grip

5. This is a picture of a lip. It is made of semi-stratified squamous tissue. It is layered for protection but contains no keratin and has fewer layers. The blood from the blood vessels in the dermis gives it the pink color. The lips have more free nerve endings than normal skin making them more sensative to touch

6. This is a picture of a mole. A mole is an overpopulation of melanocytes in an area of the skin. The dark color is a result of a concentration of melanin in a designated area. Some moles may turn cancerous

7. This is a picture of an elbow. It is an example of a pressure point so it is more stratified than other parts of the body because it needs to withstand more wear and tear. It appears a grayish-white color because it is further away from the blood supply.

8. This a picture of underneath a fingernail. The nails are an extension of the epidermis made of tough materials like keratin. This is used to withstand wear and tear and protect your nail beds, but the space between the nail and the skin allows dirt and other things to get caught underneath fingernails.