Answer:
Step-by-step explanation:
The skin is the largest organ of the body and has three layers: the epidermis, dermis, and subcutaneous layer. The epidermis is the outermost layer of the skin and is composed of five layers: stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale. The stratum corneum is the outermost layer of the epidermis and is relatively waterproof. It helps prevent bacteria, viruses, and other foreign substances from entering the body. The stratum granulosum contains keratinocytes that produce keratin, a protein that helps form hair, nails, and the outer layer of the skin. The stratum basale is the deepest layer of the epidermis and contains melanocytes that produce melanin, which provides skin color.
The dermis is located beneath the epidermis and consists of two layers: papillary and reticular. The papillary layer is the upper layer of the dermis and consists of collagen fibers, fibroblast cells, fat cells, blood vessels (capillary loops), nerve fibers, touch receptors (Meissner corpuscles), and cells that fight bacteria (phagocytes). The papillary dermis extends to the basement layer of the epidermis layer. They form a strong bond that connects like interlocking fingers. The reticular layer is the bottom layer of your dermis. It’s thick, and it contains blood vessels, glands, hair follicles, lymphatics, nerves, and fat cells. A net-like structure of elastin fibers and collagen fibers surrounds the reticular dermis