- secretes oily substances, contain sebum=grease
- reside in the dermis.
- found all over the skin, except on the palms of the hands and soles of the feet.
- ducts empty into hair follicles.
papillary layer in the dermis?
- upper dermal region has projections called dermal papillae.
- contain capillary loops which furnish nutrients to the epidermis.
- house pain receptors ( free nerve endings) and touch receptors ( meissners corpuscles)
Arrector Pili Muscle?
- gives us goosebumps, controlled by ANS.
What type of cells are in the Epidermis?
- Keratinocytes ( keratin cells) are cells that produce keratin, fibrous protein that makes the epidermis a tough protective layer.
Melanocytes?
- cells that make melanin
reticular layer in the dermis?
- deepest skin layer (contains blood vessels, sweat and oil glands)
- contain deep pressure receptors ( Pacinian Corpuscles)
- Phagocytes are found here which help prevent bacteria from entering the body.
- collagen and elastic fibers are found h
Dermis?
- acts like a bandaid for the skin (protects organs)
- has loose connective tissue and fold dermal papilla act to increase surface area.
- has reticular areas, varies in thickness ( thick in the palms of hands and soles of feet but thin on the eyel
what is on the uppermost layer of the skin, which helps prevent water loss from the body surface?
- Keratin (tough protein helps to provide a durable overcoat for the body, protects deeper cells from the hostile environment)
How is Melanin produced?
- pigment that ranges in color.
- produced by cells called melanocytes, found in the stratum basale.
Stratum Corneum?
- top most layer (dead cells)
- 20-30 cell layers thick
- dead cell remnants cornified or corny cells (cornu= horn) are filled with Keratin.
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