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The Integumentary System

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Sebaceous Gland Oil gland; Keeps skin from drying out ... If the sebaceous glands become plugged and infected, it becomes a blemish or pimple ... – PowerPoint PPT presentation

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Title: The Integumentary System


1
The Integumentary System
  • By Me and Luciano

2
What is it?
  • It is the system composed of hair, skin and
    nails.
  • A system is an association of two or more organs
    that work together to do something

Nail
Skin
Hair
3
Skin
  • Largest organ of the body
  • 2 layers dermis (lower) and epidermis (upper)
  • SA of 1 to 2 meters
  • 16 of body weight

A common sweat gland B hair follicle C
arrector pili D sebaceous gland E hair shaft F
epidermis G dermis pars papillaris H dermis
pars reticularis I hypodermis
4
Skin Parts
  • Arrector Pili Erects hair during cold or
    emotional stress
  • Sebaceous Gland Oil gland Keeps skin from
    drying out
  • Epidermis Upper layer of skin Protects dermis
    and rest of body
  • Dermis Below epidermis Contains nerve-endings,
    sweat and subaceous glands, and blood and lymph
    vessels
  • Hypodermis Independent fat cells below dermis

F epidermis G dermis pars papillaris H
dermis pars reticularis I hypodermis
A common sweat gland B hair follicle C
arrector pili D sebaceous gland E hair shaft
5
Skin Functions in Homeostasis
  • Protection
  • Body temperature regulation
  • Sensory reception
  • Water balance
  • Syntheses of vitamins and hormones
  • Absorption of materials

6
Common Skin Pathology
  • Apocrine glands produce a solution that bacteria
    act upon to produce body odor
  • If the sebaceous glands become plugged and
    infected, it becomes a blemish or pimple
  • Cancer carcinoma and melanoma
  • Contact dermatitis (e.g. poison ivy)
  • Burns First, second and third degree
  • Wrinkles
  • Calluses
  • Moles
  • Psoriasis
  • Hair loss
  • Frostbite

7
Common Pathology PicturesPart 2
Melanoma
Dermatitis
Nickel Allergy
Warts
Kaposis Saracoma
8
Wrinkles
  • Major difference between young and old
  • Loss of elasticity
  • More common in light-skinned people
  • Cross-linking collagen fibers

9
Thick vs. Thin
10
Thin Skin Thin EpidermisThick vs. Thin Part
II
  • Epidermis of thick skin is 10x epidermis of thin.
  • The different is in the thickness of the st.
    corneum
  • Thickest skin on body is the thin skin on the back

11
Miscellaneous Skin Info
  • Epidermis replaces itself every 15-30 days

12
Sweat Glands(Common)
  • Classification-Simple coiled tubular
  • Secretory Units-Shape like tubules
  • Ducts-Unbranched
  • Found through out the body
  • Most common in forehead
  • Begin functioning at birth

A Common sweat gland (duct) B Myoepithelial
cell C Common sweat gland (secretory unit)
13
Sweat Gland apocrine(Large)
  • Classification-Simple coiled tubular
  • Secretory Units-Shape like tubules
  • Ducts-Unbranched
  • Secretory units much larger than in common glands

14
Skin Color (pigment)
  • Melanin (yellow-brown-black)
  • Carotene (yellow- orange)
  • - accumulates in corneum
  • Hemoglobin (red)
  • Erythema vs. Cyanosis
  • -Influenced by blood flow, liver (jaundice)

15
Hair
  • Derived from skin
  • Extends above the skin surface
  • Made of Keratin

D Cortex E Medulla
16
Hair follicle
17
Hair Diseases
  • Baldness Loss of hair
  • Hair thinning thinning of hair
  • Hair graying graying of hair

18
Nails
  • Highly Keratinized, modified epidermal cells
  • Arises from nail bed.
  • Rate of growth depends on finger length

19
Nail Diagram
20
Nail Pathology
  • Nail Fungus
  • Ingrown nail

21
Bibliography
  • Jasons Bibliography
  • Body Systems
  • The Human Body (its structure and operation)
  • http//www.exn.ca/human/home.cfm
  • http//www.dermnet.org.nz
  • http//www.kidinfo.com/health/Human_Body.html
  • http//www.dictionary.com
  • http//www.medicaldictionary.com/
  • Lucianos Bibliography
  • How the Body works
  • The Human Body
  • http//gened.emc.maricopa.edu/bio/bio181/BIOBK/Bio
    BookINTEGUSYS.html
  • http//www.med.sc.edu/hightower/askinnoBG/sld001.h
    tm
  • http//www.anatomy.gatech.edu/aging/skin/tsld001.h
    tm
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