The skin, the body's largest organ, consists of three primary layers: the epidermis, dermis, and hypodermis. The epidermis is the outermost layer, composed mainly of keratinocytes and is divided into several sub-layers: the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale. The dermis lies beneath the epidermis and contains collagen and elastin fibers providing strength and elasticity. The hypodermis, or subcutaneous tissue, is composed of loose connective tissue and fat, providing insulation and shock absorption.
