anatomy integument

skin

• epidermis
• dermis
• hypodermis

• single layer of short columnar to cuboid cells
• consists primarily of stem cells that form keratincytes
• also has melanocytes

can dicide a couple times as they push above the basal layer

provides protexting from UV radiation

• is a thick strata consisting of many mature keratinocyte cell
• packed tightly together

• consisting of 3 to 5 layers of flattened clees
• waterproofing

• found only on think skin that has not hair
• dead cells

• dead cells
• protection from friction and abrasion

• cone shape elevations
• capillaries and mechanorectors for light touch

when tears creates stretch marks

• fatty layer- stores engery and used for instulation
• fibrous layer

process of developing an hair follicles and glands in the skin

cells arising from the center of the hair bulb puch upward

surrounding the medulla

• outside the cortex
• thin layer of flat keratinized cells

muscle that makes hairs stand up

produce an oily substance called sebum that lubricates, moisturizes, and helps waterproof the skin

• most numerous glands of the skin
• in palm, sole, and face skin
• produce a clear odorless fluid

• least numerous but largest glands of the skin
• in areas of hair
• produce a watery secretion contain protein compounds
• oderless and sterial but under bacterial digestion poten oderous compounds are generated