Transcript Integumentary System

Integumentary System
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Objectives
•Name the parts of the Integumentary
system and discuss the function of each part.
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Structure and Function
Skin is the largest organ of the body, and
serves to:
•Protect against injury
•Protect against the sun UV rays
•Prevent entry of harmful microorganisms
•Maintain the proper internal body
temperature
•Excrete waste materials through
perspiration (sweat)
•Function as a sense organ
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Two Main Layers of Skin
Skin (epidermis) –
outer most layer
Dermis – Nerves,
vessels, glands, hair
follicles
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Hair
Hair
•Hair grows out of the epidermis to cover parts of
the body.
•The shaft is what we see and the root attaches
to the muscle in the dermis.
Hair color is determined by the presence
of melanin.
Baldness or alopecia may result from
heredity, disease, injury, or
chemotherapy.
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Nails
Nails
•Nails are plates
made of hard keratin
that cover the dorsal
surface of the fingers
and toes.
•At the base of most nails a lunula or whitish
half-moon is an area where keratin and other
cells have mixed with air.
•The cuticle is a narrow band of epidermis that
surrounds the base or bottom of nails.
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Dermatology
The field dermatology is the study, diagnosis and
treatment of ailments to the skin
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Test for Disease and Allergies
Did you know that the skin can be
tested for various diseases and
allergies?
Tests for Diseases
Tests for Allergies
•Patch test
•Scratch test
•Intradermal tests
•Mantoux test used to
detect tuberculosis.
•Schick test used to
detect diptheria.
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Homeostasis
State of having a
stable internal
environment.
Example: teeter
totter unbalanced =
out of homeostasis.
Teeter totter balanced
= in homeostasis
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Homeostasis in the
Body
Ensures that your body remains
constant at 98.6 degrees F.
Protects body from external
dangers.
Removes waste from the body.
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