TERM 1
Integumentary system
DEFINITION 1
Skin
nails
hair
scales
horn
TERM 2
Functions of the Integumentary System
DEFINITION 2
1) Protects underlying soft organs and tissues.2) Protects against
chemical abrasions from surface.3) M aintains body's thermostat.4)
On exposure to sunlight, skinsynthes ize Vitamin D's which is
converted to Calcitol- ahormone req uired for metabolism of
calcium and its absorption.5) It stores nutrients.6) It removes
waste, in the form of sweat which co ntains urea, uric acid, salts,
organic waste, and ammonia.
TERM 3
Epidermis
DEFINITION 3
Stratum Basale/ Stratum Germinativum
Stratum Spinosum
Stratum Granulosum
Stratum Lucidum
Stratum Corneum
TERM 4
Stratum Basale/ Stratum Germinativum
DEFINITION 4
Single layer of dividing cells which divid e to replace the dying
cells on top.
For a new cell to reach S. Corneum it takes about 15-30 days.
At S. Corneum it remains 2 weeks be fore they are shed off as
dead cells in sheets- called DESQUAMATION.
Has melanocytes that synthesize m elanin- skin pigment. lack
of that gene is called Albinism(lack of skin pigment) due to
inability to convert Tyrosin to melanin .
Forms ridges deep in dermis and betw een 2 epidermal ridges,
used for self identity.
TERM 5
Stratum Spinosum
DEFINITION 5
made of 10-20 layers of stratified epithelium
have langerhan cells that are defensive in function
found in between S. Basale and S. Granulosum
