Subcutaneous layer

Sweat (sudoriferous) glands

- Produce sweat - Widely distributed in skin - Two types of sudoriferous glands - Eccrine glands - Apocrine glands

3. Regeneration and fibrosis

- The scab detaches, Fibrous tissue matures; epithelium thickens and begins to resemble adjacent tissue - Results in a fully regenerated epithelium with underlying scar tissue

ectoderm, endoderm, mesoderm

3 germ layers

3rd degree burn

Full thickness damage through skin into nerves and muscles; skin grafting necessary

lamellated corpuscles

detect changes in deep pressure in the skin

subcutaneous layer

hypodermis; Not part of skin; attaches skin to underyling tissues and organs; rich is adipose tissue; lamellated corpuscles

ceruminous glands

modified sweat glands, located in external ear canal, secretes cerumen (earwax)

sebum

prevents dehydration of hair and skin, and inhibits growth of certain bacteria

Nails

protective coverings on the ends of the fingers and toes; tools to pick up small objects and scratch

2nd degree burn

thermal damage to the first & second layers of the skin (epidermis and dermis) Blisters will appear, and may break making the skin appear moist. Can be red or white color depending on the thermal agent. (hot water may make them appear pale)

2. Blood supply restoration

Blood clot replaced by granulation tissue • Fibroblasts produce collagen fibers that bridge the gap • Epithelial cells multiply,

Skin wound healing

Epidermal wound healing and deep wound healing

apocrine glands

Sweat glands in the pubic and underarm areas that secrete thicker sweat, that produce odor when come in contact with bacteria on the skin; secreted during emotional stress or sexual excitment; not involved in thermoregulation

1st degree burn

Thermal damage to the first layer of skin only (epidermis), lower layers heated and react by turning red and becoming tender and uncomfortable to touch

cerumen

a waxy substance secreted by glands located throughout the external canal; prevents entry of foreign bodies into the ear canal

hairs

functions: protection, can help to reduce of heat loss, and sensing light touch composition: dead keratinized epidermal cells; sebum connected to hair follicles Structure: Shaft, root- hair follicle, papilla, matrix- diving keratinocytes, Arrector pili muscle-goose bumps

eccrine glands

glands that produce sweat; found over most of the body; helps cool body;secrete odorless clear fluid

Acessory structures of the skin

hair, skin glands, and nails

sebaceous glands

secrete sebum (oil) into the hair follicles where the hair shafts pass through the dermis

1. Inflammation

severed blood vessels, white blood cells clotting proteins seep into injured area 1. blood clotting 2. scab formation

inflammation, blood supply restoration, regenration and fibrosis

skin wound healing process