Exam 1: Ch 6 - Integumentary system Flashcards
contains:
skin, nails, hair, glands
5 functions i.s
- protection
- vit D absorption
- sensation
- temperature regulation
- excretion
Diagram of skin, know how to label each
3 levels of skin are:
hypodermis, dermis, epidermis
hypodermis
under dermis
- skin rests on this (foundation)
- consists of blood vessels, nerves, fat, aits connection to deeper soft tissue (muscle, bone)
dermis
- dense CT
- 10 to 20 times thicker then epi
- most of structural strength os skin
- where hair follicle, nerves, aa, vv are located
- stretch marks are scars that occur here (straie)
- if incisions made parallel to cleavage lines, less scarring
epidermis
epithelial tissue
- prevents water loss
- resists abrasion
- starified squamous epithelium
- where new cells are formed, they push older ones to surface to flake off
keratinization
the process in which the cytoplasm of the outermost cells of mammalian epidermis is replaced with keratin (protein that makes cells hard), helps form that abrasive resistant outer cell, also forms a permeable barrier
3 types injections
intradermal injection - TB
subcutaneous injection - into fatty tissue of hypodermis, insulin, pinch skin
intramuscular injeciton - into mm, deep into hypodermis, vaccines, abx
increased melanin =
in the nipple, freckle, moles, lips, palms and hands of feet, darker people
- during pregnancy, increased estrogen and hormones – increase melanin production that darkens nipples and groin
acne definition adn 4 reasons for it
inflammation fo hair follicules and sebaceous glands
- hormones, sebum, abnormal keratinization, bacteria
rule of 9s
sebaceous gland
secrete oil for skin and hair
sebum - blackhead
found everywhere in body except palms/soles
ceruminous glands
type of apocrin sweat gland in ear canal
secretes cerumen - mix with sebum - ear wax
protects skin of ear canal from dehydration, but it can also harden and block hearing
located hypodermis
