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Integumentary System= mostly Skin- Why do you need this?? Section 21-4 Pg.591-594.

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Presentation on theme: "Integumentary System= mostly Skin- Why do you need this?? Section 21-4 Pg.591-594."— Presentation transcript:

1 Integumentary System= mostly Skin- Why do you need this?? Section 21-4 Pg.591-594

2 Basic Skin Facts Skin is the largest organ in the body Made up of 2 layers

3 Epidermis - surface layer- very outside part and are actually dead-are rubbed off and continually replaced -Melanin-is found here, this is a pigment that makes your skin darker- this increase when exposed to UV rays (when your outside)

4 Dermis 2 nd layer, thicker layer, is where the blood vessels, nerves, oil, and sweat glands are found -Fat cells are found underneath this layer, which insulates your body

5 What are some of the jobs/function of skin??

6 Function/Job of Skin Protection – Prevents physical, chemical, and diseases

7 Sensory response – Nerves-tell pain, temp., pressure, etc.

8 Formation of Vit. D – Is produced when skin is exposed to light – Helps absorb calcium from body

9 More Function/Jobs of Skin Regulation of Body Temp. – Blood vessels within skin can hold or release heat – Hair can help keep heat in-getting the Goosebumps – Have 3 million sweat glands-help in releasing heat- through perspiration-cooling the body

10 Excretion of waste – Sweat glands release waste-salt and protein-urea

11 What happens when skin is damaged??

12 Damage to the skin When epidermis is damaged- have no cells to replace these for a while. Can get nerves and blood vessels exposed.

13 Don’t have good protection in this area, so bacteria and other items can get into the body.

14 Area is red around wound is red, warm to the touch, and discolored- These are all signs of an infection

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16 The End


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