The integumentary system comprises skin, and the appendages of skin, such as hair, nails, sweat glands, sebaceous glands, and sensory nerves.
Skin comprises three layers: epidermis, dermis, and hypodermis.
The epidermis is composed of stratified squamous epithelium and is divided into the following five sublayers or strata, listed in order from surface (superficial) to deep are:
- Stratum corneum,
- Stratum lucidum,
- Stratum granulosum,
- Stratum spinosum,
- Stratum germinativum also called stratum basale. The deepest layer is the miotic layer, stratum basale producing daughter cells by mitosis.
Read more about this topic: Head And Neck
Famous quotes containing the word system:
“The human body is not a thing or substance, given, but a continuous creation. The human body is an energy system ... which is never a complete structure; never static; is in perpetual inner self-construction and self-destruction; we destroy in order to make it new.”
—Norman O. Brown (b. 1913)