Integumentary Flashcards
Epidermal layers
Corneum, lucidum, granulosum, spinodum, basale. Can loud girls sing base.
Cells of epidermis
Keratinocytes (epitheliual cells), epidermal dendritic celss, tactile cells (sensory cells), melanocytes.
Hemangioma
Benign tumor of blood vessels…port wine stain and strawberry hemangioma.
Vitiligo
Depigmentation from melanocytes dying.
albinism
No pigment in skin, eyes, and hair. melanocytes don’t make melanin.
Two layers of dermis
Papillary layer (areolar CT), reticular layer (dense irregular CT).
Hypodermis structure
Areolar and adipose connective tissue
Hypodermis function
anchors skin to underlying structure, thermal insulation, energy reserve.
Structures of nail
nail matrix, lunula, cuticle, free edge….made of hard keratin.
Lanugo hair
Fetal hair
Vellus
fine hair on most of body
Terminal hair.
head, pubic, armpit, male facial hair.
Hair structure
Follicle, root and shaft. Contains keratin and arrector pili muscle
Alopecia
Hair thinning
Male pattern baldness
genetic influence, hormonal influence-testosterone causes terminal hair to be replaced with vellus hair
Sebaceous (oil) gland
produce sebum- oily skin
sudoriferous glands
Merocrine-numerous, watery sweat. Apocrine-viscous sweat, nipple, anal/genital areas
Acne Vulgaris
Blocked sebaceous gland
1st degree burn
damage epidermis
2nd degree burn
damage epidermis and part of dermis
3rd degree burn
damages entire epidermis and dermis
Basal cell carcinoma
Least dangerous, originates in stratum basale
squamous cell carcinoma
arise from keratinocytes
Malignant melanoma
Deadly, arise from melanocytes
