Integumentary system
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Integumentary System. By: Savannah Nash, Gatwech Both, and Zoe Hixenbaugh. General Overview. Consists of the skin, the largest organ in the human body protects the internal body from any injury or damage Aids the body in elimination Helps store fat Produces vitamins and hormones

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Integumentary System

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Integumentary system

Integumentary System

By: Savannah Nash, Gatwech Both, and Zoe Hixenbaugh


General overview

General Overview

Consists of the skin, the largest organ in the human body

protects the internal body from any injury or damage

Aids the body in elimination

Helps store fat

Produces vitamins and hormones

Maintains homeostasis

First line of defense

Protection from ultraviolent radiation


Integumentary system

Skin

  • Integument means covering

  • Has receptors that can detect:

    • Heat and cold

    • Touch

    • Pressure and pain

  • Consists of:

    • Hair

    • Nails

    • Sweat glands

    • Oil glands

    • Blood vessels

    • Lymph vessels

    • Nerves

    • Muscles


Epidermis

Epidermis

  • Outermost layer of the skin

  • Contains five sub-layers (bottom to top)

    • Stratum basale-Sratumspinosum

    • Stratum granulosum

    • Stratum licidum

    • Stratum corneum-

    • Keratinocytes

    • Melanocytes

    • Langerhans cells

    • Merkel Cells


Dermis

Dermis

  • Composed of three types of tissue

    • Collagen

    • Elastic tissue

    • Reticular fibers

  • Layers

    • Papillary-upper

    • Reticular layers-lower

  • Papillary

  • Reticular

  • Where the sensory fibers are located


Hypodermis

Hypodermis

  • Thickiest and innermost layer of the skin

  • Composed mainly of adipocytes

  • Acts as an energy reserve

  • Distributed all over the body

  • Missing on certain parts of the body

  • Insulator

  • Shock Adsorber


Sweat glands

Sweat Glands

  • In charge of cooling the skin by evaporation

  • Two types of sweat glands

    • Eccrine

    • Apocrine

  • Eccrine

    • From the dermis layer

    • Produce sweat/perspiration

    • Mainly on the forehead, upper lip, pales of hands

      and soles of feet

  • Acropine

    • Found in armpits, around nipples, and in groin

    • Also in the dermis layer

    • Do not function until after puberty


Oil glands

Oil Glands

Found in the dermis layer

Located all over the body, except palms and soles

Made of secrete sebum

Prevents skin and hair from drying

Attached to hair follicles


Blood vessels

Blood Vessels

Transport nutrients and oxygen to the skin

Transport Vitamin C from the skin to the body

Remove waste

Constrict or dilate depending on the temperature

Located in the dermis


Lymph vessels

Lymph Vessels

  • Supply lymph to the tissue of skin to help fight off microbes

  • Located all throughout the body

    alongside arteries and veins

  • Not found in central nervous system,

    bone marrow, teeth, and avascular

    tissue


Health problems

Health Problems

  • Skin Cancer-most common form of cancer in the U.S.

  • Psoriasis-common skin condition that cause irritation and redness

  • Alopecia- complete loss of hair from the head or body


Fun facts

Fun Facts

Thinnest skin is found on the eyelid

When you absorb water, your skin swells.

The skin releases about three gallons of sweat a day in hot weather.

Your skin comes in contact with over 150 different chemicals a day.

The reason our lips are red is because the skin there is so thin that our blood vessels show through.

In your life time you will shed about 40 pounds of skin.

Adults have over 20 square feet of skin.

In just one month, your body will have a whole new layer of skin.

Between 30,000 and 40,000 dead skin cells fall off your body in under a minute.

The average amount of head hair is 120,000.

Goose bumps are actually little pimples that help keep a a layer of warm air over our bodies.


Sources

Sources

http://www.drstandley.com/bodysystems_integumentary.shtml

https://sites.google.com/site/integumentarysystem305/skin/sweat-and-

http://dermatology.about.com/cs/skinanatomy/a/anatomy.htm

http://www.webmd.com/skin-problems-and-treatments/picture-of-the-skin


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