Integumentary System Flashcards
Integument means
A cutaneous membrane(skin)
integument incudes
Epidermis and Dermis
Cutaneous membrane
Dry membrane
Mucocutaneous junction
where a cutaneous membrane meets mucus membrane
Function of integument
protection from abrasion, pressure, chemical, dehydration, UV radiation
Sensory function
receptors in skin/hair bring info back to the central nervous system
Manufactured in the the skin?
Vitamin D
Epidermis
The outer most layer of skin
Dermis
deep to the epideris
Hypodermis
below the dermis
5 Layers of the epidermis
Stratum Basale
Stratum Spinosum
Stratum Granulosum
Stratum Lucidum
Stratum Corneum
Stratum Basale
Deepest layer, only layer that divides, sprout and grow
Stratum Spinosum
Fibrous keratin is forming, pushing out cell
Stratum Granulosum
cells are flattening, cells are dying
Stratum Lucidum
Clear layer (only in palms and sole of feet)
Stratum Corneum
most superficial layer, keratins are dead, 75% of the epidermis thickness
Other cells found in the Epidermis
Melanocytes, Dendritic, Merkel
Dendritic Cells
Immune cells, alert the immune system
Melanocytes
produce proteins called melanin, is controlled by gene and exposure to light
Merkel Cells
receptors, know when the skin is touched
The Dermis
largely compromised of dense irregular connective tissue, vascular and highly innervated
Two Dermal Layers
Papillary and Recticular
Papillary
Fingerprints in hands and feet, improves our grip
Reticular
deep and thicker layer, has collagen (strength) and elastic fiber (flexibility)