2. Skin plays several important roles for our bodies. 1.Skin helps to ________ body temperature. 2.Skin ________ inner tissue. 3. Skin produces vitamin ___. 4.Skin senses _____ and touch. 5. Skin helps get rid of _______ products. regulate protects D pain waste

3. Skin has two main layers: The __________ and the _________. epidermisdermis

4. The epidermis has ___ distinct layers. The deepest layer is where the new cells are _____. The top layer is composed of _____ skin. These cells are continually being shed. 5 made dead

6. Cross section of the epidermis

8. Color the epidermis tan and label.

9. The pigment that determines skin and hair color is ________. The pigment is found in a single layer of epidermal cells. The cells that produce melanin are the ___________. melanin melanocytes

11. Color the melanocyte black and label.

12. The layer of skin just beneath the epidermis is the _______. The dermis contains blood vessels, nerves, hair follicles, sweat glands, and sebaceous glands. dermis

13. Color the dermis pink and label.

14. The _____________ are a small, sack-shaped gland that release _____ (fatty) liquids onto the hair follicle (the oil softens the skin). They are usually located beside a _________. sebaceous glands hair follicle oily

17. Color the sebaceous glands red and label.

18. Sweat glands are a tube- shaped gland in the dermis that produce _______. Sweat is a liquid that includes small amounts of _________, ______, and ___________. sweat ammonia urea electrolytes

19. Sweat does more than just remove waste. It also helps keep the body from ____________. The body can get rid of extra heat through ____________. overheating evaporation

20. Color the sweat gland green and label.

21. The ____________ is a tube- shaped sheath that surrounds the part of the hair that is under the skin. The hair is nourished by the follicle at its base. This is also where the hair grows. hair follicle

25. Color the hair follicle blue and label.

26. The ___________ is the part of the hair that is above the skin. hair shaft

27. Color the hair and hair shaft gray and label.

28. The ________________ are nerve receptors that respond to pressure and vibration; they are oval capsules of sensory nerve fibers located in the subcutaneous fatty tissue. pacinian corpuscle

30. Color the pacinian corpuscle purple and label.

31. The hair _____________ is a muscle that is connected to each hair follicle and the skin. It contracts in response to cold and fear resulting in an erect hair and a “__________” on the skin. erector muscle goosebump

33. Color the erector muscle orange and label.

34. The ____________ are tubes that carry blood. Arteries bring oxygenated blood ______ the heart and lungs. Veins return oxygen depleted blood back to the heart and lungs. blood vessels from

35. Color the blood vessel red and label.

36. The ___________ _____ is the fatty tissue located under the dermis. subcutaneous tissue

37. Color the subcutaneous tissue brown and label.

38. Review: Guess the following parts of the skin.

50. http://images.google.com/imgres?imgurl=http://www.ratbehavior.org/images/Epidermis.jpg&imgrefurl= http://www.ratbehavior.org/CoatTypes.htm&usg=__VkvUF9O4ifm6Sy_BYqkJ73Qfixc=&h=372&w=516&sz =60&hl=en&start=5&itbs=1&tbnid=KD3jKdWqfbpiBM:&tbnh=94&tbnw=131&prev=/images%3Fq%3Depid ermis%26hl%3Den%26sa%3DG%26gbv%3D2%26tbs%3Disch:1 http://z.about.com/d/dermatology/1/0/e/4/Epidermis_Full_lucid.jpg http://www.riversideonline.com/source/images/image_popup/sn7_skinlayers.jpg http://www.clearskinacne.com/wp-content/uploads/skin-epidermis-dermis-hair.jpg http://www.pgbeautygroomingscience.com/assets/images/wosc/Chapter%201/Special%20Ski n%202.jpg http://missinglink.ucsf.edu/lm/IDS_101_histo_resource/images/172-1x- Hair_follicle_labelled.jpg http://www.riversideonline.com/source/images/image_popup/sn7_hairfollicle.jpg http://images.google.com/imgres?imgurl=http://www.immediart.com/catalog/images/big_images/SPL_E_P720213- Hair_follicles,_SEMSPL.jpg&imgrefurl=http://www.immediart.com/catalog/product_info.php%3Fproducts_id%3D288&u sg=__OGcnxzsTcBkLTvtQZLdccjXV40=&h=301&w=350&sz=69&hl=en&start=6&itbs=1&tbnid=BZwQCNRnzu8OHM:&tbnh= 103&tbnw=120&prev=/images%3Fq%3Dhair%2Bfollicles%26hl%3Den%26gbv%3D2%26tbs%3Disch:1 RESOURCES

51. http://cas.bellarmine.edu/tietjen/Laboratories/Bio%20Pix%204%20U/Image102.gif http://www.supertightstuff.com/wp-content/uploads/2009/02/goosebumps.jpg http://www.dmk-uk.com/images/treatments/skin-diagram-acne.gif http://myhealth.ucsd.edu/library/healthguide/enus/images/media/medical/hw/h9991258.jpg http://www.lib.uiowa.edu/hardin/mD/pictures22/dermnet/21_basal_cell_carcinoma_cancer _imiquimod0822057.jpg http://science.nationalgeographic.com/staticfiles/NGS/Shared/StaticFiles/Science/Images/Co ntent/epidermis-sb3849-sw.jpg http://www.enchantedlearning.com/subjects/anatomy/skin/