1. Monday, January 11, 2010 Warm –up question Which muscle type is voluntary but may react involuntarily at times? Give an example when this would happen.

2. Last day to turn in any late homework is Wednesday Don’t forget… you get a behavior grade on your report card. This can either be a really good thing, or a really bad thing! Question of the day gets handed in everyday, no late work will be accepted.

3. In your interactive folder… Key Notes from cells, tissues and organ systems plus any notes we took on this Key notes from last week Foldable Muscle chart and slide drawings (Friday) Any other information that will help you on the test Remember, this folder counts as a test grade and may be used on the next test

4. The Skin Obj. D.1.5.1, D.1.5.2 Page 328

5. After this lesson you can amaze your friends by knowing….. The functions and the structures of the skin Identifying habits that can help keep skin healthy

6. Key Terms Epidermis Dermis Cancer Melanin Pore follicle What do you think your skin does?

7. What is the largest organ in the human body? The SKIN performs many functions –It covers and protects the body from injury, infections, and water loss –It helps regulate body temperature –Eliminates wastes –Gathers information about the environment –Produces vitamin D Center page of foldable

8. The skin is a tough covering Protects the body Maintains temperature Eliminates wastes Gathers information Produces Vitamin D Concept map

9. Monday, January 11, 2010 Read pages 328 -333 Define Key Terms page 330 – Cornell style Assessment questions page 333 ~ Write the questions Both of these goes into your interactive folders

10. Question Time! 1. What is the most obvious function of the skin? 2. How does skin regulate temperature? 3. How is waste eliminated by the skin? 4. What information can you gather from the environment through your skin? 5. How does your skin help you to have healthy bones?

11. The Skin The skin has 2 main layers 1.Epidermis 2.Dermis Epidermis is the top layer; the layer you can see It’s made of a layer of dead skin cells Produces melanin

13. Interesting facts…. Your Amazing Skin One square centimeter of skin contains: 100 perspiration glands 3,000,000 cells 3,000 sensory cells at the ends of nerve fibers One yard of blood vessels 15 sebaceous glands Four yards of nerves

14. The Science of the Skin Your skin is: Your largest organ A vital component of your immune system A powerful eliminator of toxins

15. Epidermis Skin cells: Renew and exfoliate every 24 to 40 days Contain no direct blood supply or nerve endings Dead skin carries away bacteria and germs

16. Irreplaceable Moisture Complex Contains: Oxygen Nutrition (from moisture & oil glands) Moisture (perspiration) with Water soluble vitamins Oil (sebum)

17. The Dermis Inner layer of skin Contains nerve and blood vessels Contains sweat glands, hair, and oil glands Sweat comes out of openings called pores Hair grows out of openings called follicles

19. Question time… What is the epidermis made of? How do these dead cells protect? What is the advantage of having dead cells make up the outer layer of skin instead of living tissue?

20. Caring for your skin Eat a healthy diet Keep skin clean Limit sun exposure

21. Cancer is a disease in which some cells in the body divide uncontrollably Sun exposure can cause the skin to become wrinkled and leathery!

22. Complete assessment on page 333 Page 337 Reviewing key terms, answer 1 - 10