6th Grade Science<br />Integumentary System<br />
I. General<br />Size<br />1. Largest organ<br />2. 7% of body weight<br />B. Function<br />	1. Protection from injury<br /...
C. Layers<br />Epidermis (Keratinocytes)<br />i. Outer layers<br />ii. No blood or nerves<br />iii. Cells die and are repl...
2. Dermis<br />i. Many blood vessels and nerves<br />ii. Sweat glands – Cool body<br />iii. Oil glands<br />a. Hair and sk...
D. Special Structures<br />1. Nails<br />
2. Hair<br />i. ArrectorPili Muscle (Fright or cold)<br />
II. Injuries<br />A. Classified by severity<br />1. First degree burn – only epidermis is damaged<br />2. Second degree bu...
III. Diseases<br />Cancer (sun exposure)<br />	1. Basal cell carcinoma – most common<br />	2. Squamouscell carcinoma<br />...
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Integumentary system

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Integumentary system

  1. 1. 6th Grade Science<br />Integumentary System<br />
  2. 2. I. General<br />Size<br />1. Largest organ<br />2. 7% of body weight<br />B. Function<br /> 1. Protection from injury<br />2. Protection from infection<br />3. Protection from water loss<br />4. Control body temperature<br />5. Remove waste<br />6. Gather information about the world<br />7. Activation of Vitamin D<br />
  3. 3. C. Layers<br />Epidermis (Keratinocytes)<br />i. Outer layers<br />ii. No blood or nerves<br />iii. Cells die and are replaced every two weeks<br />iv. Constant outward flow protects from bacteria<br />v. Layers prevent water loss<br />vi. Produces melanin (protect from UV damage)<br />
  4. 4.
  5. 5. 2. Dermis<br />i. Many blood vessels and nerves<br />ii. Sweat glands – Cool body<br />iii. Oil glands<br />a. Hair and skin health<br />b. Chemical signals<br />iv. Hair<br />
  6. 6. D. Special Structures<br />1. Nails<br />
  7. 7. 2. Hair<br />i. ArrectorPili Muscle (Fright or cold)<br />
  8. 8. II. Injuries<br />A. Classified by severity<br />1. First degree burn – only epidermis is damaged<br />2. Second degree burn – upper part of dermis<br />i. Blisters appear<br />ii. Skin heals with scarring<br />3. Third degree burn – consume thickness of skin<br />i. Burned area appears white, red, or blackened<br />ii. Often little pain noticed as nerves are all dead<br />
  9. 9. III. Diseases<br />Cancer (sun exposure)<br /> 1. Basal cell carcinoma – most common<br /> 2. Squamouscell carcinoma<br /> 3. Melanoma –Most dangerous type<br />B. Age spots<br />C. Smoke damage<br />
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