(There are less fibers in papillary layer which means less white blood flow/cells)
What does the reticular layer consist of?
Meshwork of collagen and elastic fibers
Hypodermis (subcutaneous) "below the dermis"
Not part of the skin
Anchors skin to underlying organs
Composed mostly of adipose tissue (accounts for half of the bodys stored fat) "subcutanecus fat"
What are the different aooendages of the skin?
Produce oil (sebum) a lubricant for the skin
Most with ducts that empty into hair follicles
Glands are activated at puberty (under hormonal control) ex-acne
Widley distributed in skin
Two types :
Modified sweat glands
ceruminous glands - produce ear wax
coiled portion in dermis, distributed body wide, helps dissipate excess heat through evaporative cooling)
ducts empty into hair follicles, axillary and pubic regions, activated by stress, pain, and sexual excitement, fatty acid and protein secretion
Strand of dead, hard keeatinized epthielial cells
Hair follicle consist of:
Tubelar invaginations of the epidermis
Formed by mitotically active statum basale cells
Melancocytes provide pigment for hair color
Dermal capillaries provide blood supply
The parts of hair are:
Nail fold (lateral and proximal skin coverings)
Nail bod: sheet of hard keratin attached to nail bed, Lunula-crescent shaped vascular area at proximal end of the nail bed and visable through the nail. used for visual check of oxygen status in patients (clinical: Eponychiitis, ingrown toenail)
Lines of cleavage
Decubitus ulcers or "bed sores"
Where are the different injection sites?
Intadermal (ID) within the dermis ex-collagen
Subcutaneous ("subcue" or SQ) ex-insulin for diabetics, lots of blood vessles
Intramuscular (IM) Small amounts is faster than SQ
Intravenous (IV) fastest method "fastest delivery to the heart"
Fluid-filled pocket between epidermis and dermis
Lines of cleavage:
Formed by uniform alignment of collagen and elastic fibers