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