Work Step by Step
Option a. is incorrect. The dermis is the second layer of skin and lies just beneath the epidermis. Blood vessels, nerve endings, sensory receptors, glands, hair follicles, smooth muscle, and collagen lie within this layer. Option b. is incorrect. A strong, fibrous protein called keratin are made in older cells as they move to the top of the epidermal layer. Option d. is incorrect. Melanin is a dark brown pigment found in the epidermis. Option c. is correct. The epidermis is the outermost layer of the skin.