Functions
sweating, blood flow, dilation/constriction
What is Temperature regulation?
makes up 90% of cells, makes keratin a water-resistant protein
What are Kerstinocytes?
8-10 layers, alive, some mitosis, keratin
What is the stratum spinosum?
Friction lines, starts in utero
What are fingerprints?
Responsible for a person's hair, eye, and skin color
What are melanins?
A primary physical barrier, acid mantle
What is protection?
palms, fingers, soles of feet, toes/ contains all 5 strata layers
What is thick skin?
2-5 layers, alive and dying cells, keratohyalin
What is stratum granulosum?
Developes in areas of high friction or pressure, tend to be localized in the stratum corneum
What are callouses?
White lights reflect back the colored wavelengths giving the appearance of color
What is eye colors appearance?
waste released in sweat
What is excretion?
makes up 10% of epidermis, pigments
What are Melanocytes?
1 layer, alive, mitosis, cube-shaped
What is the stratum basale?
Cells that make the pigments found in the skin
What are melanocytes?
Short thin unpigmented hairs
What are Vellus hairs?
receptors for touch, pain, temperature
What is sensation (sensory)?
only contains 4 strata layers?
What is thin skin?
40-45 layers, dead, squamous cells held together by desmosomes
What is the stratum corneum?
Hair is made by
What are Keratinocytes?
lifts hair, goosebumps
What is the arrector-pilli muscle?
some precursors for this vitamin made in the epidermis
What is Vitamin D production?
<1% of the cells that make up the epidermis, part of immune function, wandering
What are Intraepidermal macrophages?
3-5 layers, flat, dead & clear, present in thick skin only
What is the stratum lucidum?
Determines the pigments of hair, skin, and hair
What is how active the melanocytes are and which melanins are present?
long, pigmented, thicker hairs, pubic
What are Terminal hairs?