Answer
The epidermis consists primarily of epithelial cells. In contrast the dermis is composed mostly of connective tissue; it has few cells.
Work Step by Step
The epidermis is over 80% keratinized squamous epithelial cells. Other types of cells found in the epidermis are melanocytes ( pigmented cells of the skin), macrophages , and tactile cells called Merkel cells. Melanocytes protect nuclear DNA from UV damage, and Merkel cells detect touch sensation.The epidermis is avascular, and it depends on dermal blood vessels for transportation of nutrients, gases, and wastes.
The dermis is mainly tough irregular connective tissue which has both collagen and elastic fibers, but very few cells. The cell types in the dermis include fibroblasts, macrophages and fat cells. Unlike the epidermis the dermis is richly vascular; it also has nerves, glands and hair follicles.
