Anatomy Integumentary System

Epidermis

the most superficial layer of epithelium that provides the first barrier of protection. Made up of keratinized stratified squamous tissue.

Dermis

underlying dense connective tissue containing blood supply, nerve endings, sweat glands, and hair follicles

Subcutaneous/Hypodermis

loose connective tissue deepest layer consisting of adipose(fat) storage connecting skin to the muscle underneath

Keratin

protien that makes the skin waterproof and strong and is found in the hair and nails

Melanin

located in the dermis and produce skin and hair pigmentation

Melanocyte

a cell in skin and eyes that produces melanin

Skin Cancer (ABCDE)

Asymmetry

Border

Color

Diameter

Evolving

Basal Cell Carcinoma

least malignant and most common occurs in the basal cell

Squamous Cell Carcinoma

common cancer of the squamous cells found in the epidermis

Melanoma

most dangerous skin cancer is fast evolving

Hair follicle

organs that form hair are located deep in the dermis, produce nonliving hairs, wrapped in dense CT sheath, the base is surrounded by sensory nerves, and controls bacteria

Hair shaft

portion of hair above the skin

Arrector pili muscle

involuntary smooth muscle causes hair to stand up which produces ¨goose bumps¨

Ecrine sweat gland

produce sweat found in armpit and anogenital area

Sebaceous gland

oil glands

Alopecia

male patterned baldness that is passed down hereditary from mothers side

Cerumenous gland

produces cerumen (ear wax)

Dilation

Constriction

Mammary Glands 

specialized sweat glands that secrete milk

Acne

inflammation and infection of sebaceous glands

Receptors-

Pacinian corpuscle

cell deep in the dermis that is capable of detecting pressure

Meissners corpuscle

sensitive touch receptors in the dermis that respond to light touch and vibration

Ruffini 

in the lower dermis and are heat receptors

Merkel discs

upper dermis light touch receptors

Free Nerve endings

pain receptors located in the dermis

Krause bulbs

cold receptors in the mid dermis