ANAT 025 Lecture Notes - Lecture 4: Hair Follicle, Hair, Stratum Basale
Document Summary
Nails, hair, and sweat and sebaceous glands are derived from the epidermis and are considered appendages of the integument. Prevent damage when fingers or toes are subjected to mechanical stress. The cells that form in the nails are densely packed and filled with parallel fibers of hard keratin. Most of the nail body appears pink because of the blood flowing in the underlying capillaries. The free edge appears white because there are no underlying capillaries. The lunula is the whitish semilunar area of the proximal end of the nail body. The lunula appears whitish because a thickened underlying stratum basale obscures the blood vessels. The cuticle is known as the eponychium, which is a narrow band of epidermis. The layer of epidermis that the nail body covers is called the nail bed. Nail root is the proximal part of the skin embedded in the skin.
