Chapter 6: Integumentary System chopped

Epidermis

• contains Merkel cells

• contains melanin

• contains keratin

• determines whether skin is classified as thick or thin

• composed stratified squamous epithelium

Dermis

• contains sebaceous glands

• contains smooth muscle

• contains hair follicles

• composed of dense irregular collagenous and areolar connective tissues

• contains a reticular layer

• contains sweat glands

• contains a papillary layer

• contains nail roots

Hypodermis

• can also be called subcutaneous

• provides insulation

• acts as an energy reservoir

• composed of adipose and areolar connective tissues

• can also be called superficial fascia

• not technically apart of the skin

Order the steps of wound repair described below.

1. cut blood vessels bleed into the wound

2. blood clot forms, preventing pathogens from entering body and allowing leukocytes to clean wound

3. blood vessels regenerate and granulation tissue forms

4. epithelium regenerates and connective tissue fibrosis

Fibrosis

replaces damaged integument with scar tissue

Regeneration

replaces damaged integument with exactly what was damaged

What are the functions of the integumentary system?

• immune system protection

• sensory reception

• prevention of water gain

• protection 

• prevention of water loss

• metabolic regulation

• temperature regulation

• secretion

• absorption

A

epidermis

B

dermis

C

hypodermis

D

merocrine sweat gland

E

arrector pilus muscle

F

sebaceous gland