integumentary system.pptx

8/11/2019 integumentary system.pptx

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Presented by:Patrizzia Ann Rose Ocbina

Alea Jurquina

Kim


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INTEGUMENTARY SYSTEM


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The integumentary system is an organ

system consisting of the skin, hair, nails,and exocrine glands. The skin is only a

few millimeters thick yet is by far the

largest organ in the body.

INTEGUMENTARY SYSTEM


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Why do we need

Skin?


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-Skin protects you by keeping

moisture in your body and foreignparticles out of your body

-Skin keeps you in touch with theoutside world. The nerve endings

in your skin allow you to feelwhats around you


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ACCESSORY STRUCTURE

NAILS

HAIR

GLANDS


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THE SKIN


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1. skin

a. epidermis (superficial epithelium)

b. dermis (under lying connective tissuelayer)

2. hair

3. nails

4. glands


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The two layers-The epidermisis thethinner layer of the two. Itis what you see when you

look at your skin-The deeper, thicker layer isknown as the dermis

- Subcutaneous Layer also

known as the hypodermis,isfound between the skin andany underlying structuressuch as muscle or bone


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EPIDERMIS


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-The epidermis is composed of a type of

epithelial tissue.

-The epidermis is only as thick as two

sheets of notebook paper over most of thebody

-It is thicker in the palms of your hands

and the soles of your feet.


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-Most epidermal cells are dead and

are filled with a protein calledkeratin, which helps make the skin

tough.-The Epidermis is made up of

stratified squamos


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DERMIS


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-The dermis lies underneath the

epidermis

-It is mostly connective tissue, and

it contains many fibers made of aprotein called collagen

-The fibers provide strength andallow skin to bend without tearing


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The Hair


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-A hair is formed at the bottom of a

tiny sac called a hair follicle-The hair grows as new cells are

added at the hair follicle and oldercells get pushed upward

-The only living cells in a hair are in

the hair follicle


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FUNCTIONS OF THE HAIR

-Hair protects skin from ultraviolet light

and keeps dust and insects out of your

eyes and nose.

-Hair helps regulate body temperature


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The Nails


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-a horny covering on the upper

surface of the tip of the finger andtoe in humans and other primates.

-Nails form from nail roots underthe skin at the base and sides of

nails

-As new cells form, the nail growslonger


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FUNCTION OF THE

NAILS

-Nails protect the tips of yourfingers and toes so that they can

remain soft and sensitive

-Nails can tell you your healthbody


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THE GLAND

There are four types of glands:

Sweat glands - make sweat to control

temperature.

Sebaceous glands - make oil.

Ceruminous glands - make ear wax.

Mammary glands - make milk and are

only in women.


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Thin skin-covers most of the

body and is associated with hairfollicles,sebaceous glands,and

sweat glandsThick skin-has sweat glands but

no sebaceous glands or hairfollicles


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