Transcript Name the parts of the Integumentary system and discuss the

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•Why do humans have skin?
Name AT LEAST 3 reasons.
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•Name the parts of the Integumentary
system and discuss the function of each part.
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Skin is the largest organ of the body, and
serves to:
•Protect other organs and
tissues
•Maintain body temperature
•Excrete waste materials
through perspiration (sweat)
•Function as a sense organ
•Produce Vitamin D
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Three Main Layers of Skin
A. Epidermis – outer
most layer
B. Dermis – Nerves,
vessels, glands, hair
follicles
C. Hypodermis –
attaches skin to body,
composed of fat for
warmth
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Hair - Epidermis
•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 - Epidermis
•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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Glands - Dermis
•Sweat glands
release waste which
cools the skin.
•Oil Glands moisten the skin and make it flexible
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The field dermatology is the study, diagnosis and
treatment of ailments to the skin
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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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Fun Facts
Skin is the largest organ in your
body
Your skin contains millions of
sensory receptors
You lose 30,000-40,000 dead
skin cells every minute!
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