Chapter 5 Notes: Integumentary System

Structure and Function Structure

o The integumentary system is composed of the ___________________________________________________ (nails, hair, sweat glands and sebaceous glands)

Functiono Protects other body systems from injury and infectiono Helps the body maintain homeostasis by __________________________________________________________

_________________________________________________________________________________________________________

Skin ________________________________________________________________________________________________________________ Varies in thickness from 1/5 inch (0.5 mm) in the eyelids to ¼ inch (6.3 mm) in the soles of the

feet Changes in the skin often indicate the presence of other body system disorders including anemia,

respiratory disorders, liver disorders, cancer, and shock

Layers of Skin Epidermis

o _____________________________________________________________________________ that is composed of a surface of dead cells with an underlying layer of living cells.

Dermiso Called the “true” skin; the dermis contains the ___________________________________________________

________________________________________________________________________________________________________

Hair and Hair Follicles Skin has hair in all areas except the soles of the feet and palms of the hands

Hair serves to ________________________________________________________________________________________________ through structures such as the nose and eyes

The visible portion of hair is called the ____________________________________________________

The _____________________________________________________ is found within the skin and includes the hair bulb with its covering

Glands 3 types of glands in the skin

1. _______________________________________________________________________________

2. _______________________________________________________________________________ Apocrine

Found in the armpits Eccrine

All over the body and secretes a water based sweat to cool humans

3. ________________________________________________________________________________ Modified sweat glands that produce ear wax

Function is to help regulate the body temperature and excrete body wastes

Disorders of the Integumentary System

_________________________________________________________o Caused by increased secretion of oil due to an increase in hormones during puberty

Albinismo Inherited disorder in which ______________________________________________ is not produced

__________________________________________________________o Baldness

Athlete’s footo Contagious __________________________________________________________________ of the foot

___________________________________________________o Bacterial infection of the dermis and subcutaneous layer of the skin

Chloasmao _________________________________________________________________________________________________________

________________________________________________________________o Upper lip has a cleft where the nasal palate doesn’t meet properly

Contact dermatitiso _______________________________________________________ that may occur after initial contact or as an

acquired response

Dandruffo White flakes of dead skin cells from the scalp

________________________________________________________________o Sores or areas of inflammation that occur over bony prominences of the body

Eczemao Group of disorders caused by ______________________________________________________________________

Fungal skin infectionso Skin infections that live on dead ___________________________________________________________________

Furuncleo _________________________________________________________________________________________________________

_______________________________________________o Abnormal amount of hair growth in unusual places

Impetigoo Very contagious bacterial skin infection that occurs most often in

______________________________

Kaposi’s sarcomao Form of cancer that originates in the _________________________________________ and spreads to

skin

__________________________________________________o Chronic skin disorder in which too many epidermal cells are produced

Vitiligoo Condition that causes loss of _______________________________________________________________________

Warto Papule caused by a __________________________________________________________________________________

Skin cancero 3 forms

_______________________________________________

_______________________________________________

_______________________________________________

Signs of melanomaA AsymmetryB Border irregularityC ColorD Diameter greater than 6 mm

Burnso 1st degree

______________________o 2nd degree

________________ thicknesso 3rd degree

________________ thickness

1st 2nd 3rd