Can blood vessels be found in the epidermis?
Makes hair and nails
layer of integument where appendages reside.
Palms of hands and soles of feet
2 areas devoid of sebaceous glands
outer layer of hair
inner layers of hair
tissue that makes up hair
white, crescent-shaped area of a nail
Body of nail
The visible part of the nail
Band of epidermis at the base and sides of the nail plate
where nails are formed and are composed of keratinized stratified squamous epithelial cells producing a very tough covering
Blood in capillaries located in upper dermis is pushed out. Therefore there is no red pigment to make skin color, so it turns white.
The reason skin changes color under pressure
Two point threshold
the smallest distance at which two points of contact can be felt
Touch Receptor Adaptation
The process in which your skin stops feeling a certain pressure
Adipose tissue location
Hair and nails
Protection and thermoregulation
Adipose tissue function
Sweat gland location
Secretion of sweat, thermoregulation, bacterial protection
Sweat gland function
Structural protein found in the skin and connective tissue
Skin and connective tissue
Location of collagen
an orange isomer of an unsaturated hydrocarbon found in many plants
Function of carotene
Location of hemoglobin
To carry oxygen to body.
Function of hemoglobin
Base of nail body
Location of lunula
Defines free edge of nail plate, attaches nail to bed
Function of lunula
Location of papilla
Allows blood to reach hair follicle
Function of papilla
Hair root plexus
Free nerve endings wrapped around hair follicle; Detects hair movement
Function of hair root plexus
Wrapped around hair follicle
Location of hair root plexus
Pigmentation, protection from UV rays
Function of melanin
Gives skin elasticity and recoil
To contract, raising hairs (because of thermoregulation)
Function of arrector pili muscle
Moisturization, waterproofing, protection from bacteria
Function of sebum
Skin cancer of melanin. (Occurs in highly concentrated areas of melanin i.e. moles. Accounts for a very small percentage of skin cancers.)
Squamous Cell Carcinoma
Type of skin cancer more serious than basal cell carcinoma; often characterized by scaly red papules or nodules. Accounts for 25% of skin cancer cases. Occurs in stratum Spinosum.
Basal Cell Carcinoma
Most common and least severe type of skin cancer; often characterized by light or pearly nodules. Occurs in cells in the Stratum Basale. Accounts for 70% of skin cancer cases.
Bacterial skin infection characterized by isolated pustules that become crusted and rupture. Caused by staph infection.
Chronic overproduction of skin cells. Results in reddened lesions.
Oral Herpes Simplex virus. Small, fluid filled blisters on mouth.
Fungus infection usually in the skin of the toes and soles
Synthesization of vitamins A, D, E, and K, excretion of urea and ureic acid, protection from bacteria, protection from mechanical damage, protection from UV radiation, protection from dessication, thermoregulation, protection from chemicals
8 functions of integumentary system.
A tiny artery that takes blood into capillaries
A tiny vein that drains blood from capillaries
The dense dermis surrounding the hair follicle
Inner layer of follicle; composed of epithelial tissue
At bottom of bulb; blood-rich connective tissue, hair growth begins here
The deep, expanded end of the hair follicle
The science quiz set from 5 days ago
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