SKIN -- The Integumentary System Structures to Know Sheet Biology 2212
for the Lab Practical Dr. Adams
Epidermis:
Cells -- Keratinocytes
Strata -- basale, spinosum, granulosum, (lucidum), corneum
Dermis:
Papillae/Papillary layer (loose [areolar])
Reticular Layer (dense irregular)
Dermal ridges
Hypodermis: Adipose Tissue
Skin Appendages: all are epidermal derivatives
Hairs: keratinocytes
Shaft and Root
Cuticle, Cortex, Medulla
Follicles: hair root, hair bulb
Root sheaths – epithelial and connective
Arrector Pili Muscles
Glands: sweat (sudoriferous) and oil (sebaceous) glands
Sweat: simple coiled tubular glands (merocrine)
Sebaceous: Simple (branched) alveolar glands (holocrine)