Module 6 Integumentary System

What is the epidermis

The surface portion of the skin

Contains most of the accessory structures of the skin

Dermis

Made up of adipose; connects the tissue to muscle

Subcutaneous layer

Stratum basale

produces melanocytes, bottom of epidermis layer

Stratum corneum

protective uppermost layer

keratin

protein that makes up the hair and nails

Structure of the hair

root, shaft, arrector pili muscles, and melanocytes

Structure of nails

Nail root, nail plate, nail bed, lunula, and cuticle

What are the two major glands in the skin

Sebaceous (oil) and sudoriferous (sweat)

Apocrine glands

located in the armpit/groin

glands located all over the body

eccrine glands

What are the four major functions of the skin

Protection against infection, dehydration, regulation of body temperature, and collection of sensory information

Melanin

produces skin pigmentation

macule

lesion that is a spot, not raised or depressed

papule

Lesion that is firm and raised

nodule

large firm papule

vesicle

fluid filled sac; blister

pustule

vesicle filled with pus

excoriation

scratch into skin

laceration

rough, jagged wound

ulcer

sore due to death of tissue

1st degree burn (epidermis/dermis)

superficial partial-thickness

2nd degree (epidermis/more dermis)

deep partial thickness

3rd degree (epidermis, dermis/hypodermis)

full-thickness

3 types of cancer

basal cell carcinoma, squamous carcinoma, and melanomas

impetigo

clusters of contagious bacterial skin infection