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Structures of the integumentary s ystem

Structures of the integumentary s ystem. Layers of the integumentary system Epidermis – outermost covering Dermis- True skin Subcutaneous- under dermis, hypodermis. About the size of a shower curtain in an adult. Structures of the integumentary s ystem. Epidermis Text pp73-74

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Structures of the integumentary s ystem

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  1. Structures of the integumentary system Layers of the integumentary system • Epidermis –outermost covering • Dermis-True skin • Subcutaneous-under dermis, hypodermis About the size of a shower curtain in an adult. 3.05 Remember the structures of the integumentary system

  2. Structures of the integumentary system Epidermis Text pp73-74 • Outermost layer of skin • Made of epithelial cells • Avascular Stratum Corneum-outermost layer, dead scale-like keratinized cells Stratum Germinativum-deepest epidermal layer, contains papilla (ridges pushing up from dermis) • Why are some people dark and others fair skinned? • Can this be changed?-Research this 3.05 Remember the structures of the integumentary system

  3. Functions of the integumentary system • Epidermis • What is the function of the epidermis? • What do melanocytes do? • Protection is the major function of intact skin. • The epidermis is composed of dead and living cells. 3.06: Understand the functions and disorders of the integumentary system

  4. Structures of the integumentary system Dermis • True skin • Made of connective tissue • Vascular 3.05 Remember the structures of the integumentary system

  5. Functions of the integumentary system • Dermis • How is the dermis different from the epidermis in its function? • Why is this important to your health? 3.06: Understand the functions and disorders of the integumentary system

  6. Structures of the integumentary system Dermis contains many structures (organs) • Connective tissue • Collagen tissue bands • Elastic fibers • Numerous blood vessels • Nerve endings • Muscles • Hair follicles • Oil glands • Sweat glands • Fat cells subcutaneous 3.05 Remember the structures of the integumentary system

  7. Structures of the integumentary system Subcutaneous layer • Hypodermal • Lies under the dermis • Sometimes called superficial fascia • Consists of loose connective tissue • Contains one-half of the body’s stored adipose tissue epidermis, dermis subcutaneous 3.05 Remember the structures of the integumentary system

  8. Functions of the integumentary system • Subcutaneous layer • Hypodermal layer Hypo- dermal • What are the benefits of the subcutaneous layer of skin? 3.06: Understand the functions and disorders of the integumentary system

  9. Structures of the integumentary system With age, the subcutaneous layer begins to disappear; this causes the skin to sag and wrinkle. epidermis, dermis subcutaneous 3.05 Remember the structures of the integumentary system

  10. Structures of the integumentary system Appendages • Hair • Nails • Glands • Sweat glands • Sebaceous glands epidermis, dermis subcutaneous 3.05 Remember the structures of the integumentary system

  11. Structures of the integumentary system Hair • Cortex-outer layer of hair • Medulla-inner part of hair • Shaft-visible part of hair • Root-implanted in skin • Hair follicle-hollow tube where hair grows • Papilla-contains capillaries to nourish hair root • Arrector pili muscle-puckers skin at hair when exposed to sudden chill Beards are the fastest growing hairs. Nearly 30 feet in a lifetime! 3.05 Remember the structures of the integumentary system

  12. Functions of the integumentary system • Hair-text p 75 • What is the function of hair? • What happens to your hair type and color with age? • What happens to your hair when you are cold? Why? 3.06: Understand the functions and disorders of the integumentary system

  13. Structures of the integumentary system Nails- Text pp75-76 • Made of dead keratinized epithelial cells fused together • Cover dorsal side of phalanges • Originate from the nail root • What does the condition of a person’s nails tell about their general health? Did you know???? In Egypt, the status of women were established by the color of their nail… red being the highest. 3.05 Remember the structures of the integumentary system

  14. Structures of the integumentary system Sudoriferous glands • Sweat glands • Present in large numbers under arms, palms of hands, and soles of feet • Helps regulate body temp by excreting persperation • Produce odor when secretions mix with bacterium on outer surface of skin 3.05 Remember the structures of the integumentary system

  15. Structures of the integumentary system Sebaceous glands -Oil producing microscopic glands -Located adjacent to a hair follicle -secrete an oil for hair & skin that keep hair from becoming dry and brittle 3.05 Remember the structures of the integumentary system

  16. Structures of the integumentary system • Microscopic view of the skin 3.05 Remember the structures of the integumentary system

  17. Functions of the integumentary system The skin has remarkable ability to heal itself. How does this happen? 3.06: Understand the functions and disorders of the integumentary system

  18. Disorders of the integumentary system Acne vulgaris: Text pp77-78 • Oily deposits harden & pores become plugged when the secretions can’t escape, leukocytes fill pores creating pus • How is it treated? • Can it be prevented?  What role do sebaceous glands have in relation to pimples? 3.06: Understand the functions and disorders of the integumentary system

  19. Disorders of the integumentary system Athlete’s foot • What causes athlete’s foot? • Does everyone have the same symptoms? • How is it treated? 3.06: Understand the functions and disorders of the integumentary system

  20. Disorders of the integumentary system Burns: • First-degree superficial 3.06: Understand the functions and disorders of the integumentary system

  21. Disorders of the integumentary system Burns: • Second degree Partial thickness 3.06: Understand the functions and disorders of the integumentary system

  22. Disorders of the integumentary system Burns: • Third-degree Full thickness 3.06: Understand the functions and disorders of the integumentary system

  23. Disorders of the integumentary system Burns: • Compare the different degrees of burns. 3.06: Understand the functions and disorders of the integumentary system

  24. Disorders of the integumentary system Burns: Rule of Nines • Used to quickly assess percentage of body surface burned. • Can be used to determine extent of treatment needed. 3.06: Understand the functions and disorders of the integumentary system

  25. Disorders of the integumentary system Dermatitis/Eczema • dermat- -itis • What is dermatitis? • How are dermatitis and eczema similar? • How are they different? • What is the treatment? 3.06: Understand the functions and disorders of the integumentary system

  26. Disorders of the integumentary system Herpes Herpes simplex virus • Two types of HSV: • HSV type 1 • HSV type 2 • What are the symptoms? • How is it spread? • What is the prognosis? 3.06: Understand the functions and disorders of the integumentary system

  27. Disorders of the integumentary system Psoriasis • Describe this picture. • Who is likely to have psoriasis? • What is the treatment? 3.06: Understand the functions and disorders of the integumentary system

  28. Disorders of the integumentary system Ringworm • How is it spread? • What causes ringworm? • What is the medical term? • How is it treated? Two examples of ringworm How would this be diagnosed? 3.06: Understand the functions and disorders of the integumentary system

  29. Disorders of the integumentary system Scabies • What is the cause of scabies? • Is it contagious? • How is it treated? • How is it prevented? 3.06: Understand the functions and disorders of the integumentary system

  30. Impetigo 3.05 Remember the structures of the integumentary system

  31. Disorders of the integumentary system Shingles • What is the cause of shingles? • Is it contagious? • Who is most at risk? • How is it prevented? 3.06: Understand the functions and disorders of the integumentary system

  32. Disorders of the integumentary system Skin cancer • What are the risk factors for developing skin cancer? • How can it be prevented? • Three types: • Basal cell carcinoma • Squamous cell carcinoma • Malignant melanoma 3.06: Understand the functions and disorders of the integumentary system

  33. Disorders of the integumentary system Skin cancer Basal cell carcinoma • What is distinctive about this type of skin cancer? • Where does it usually form? 3.06: Understand the functions and disorders of the integumentary system

  34. Disorders of the integumentary system Skin Cancer Squamous cell carcinoma • What is skin cancer? • Why does it develop? • How is squamous cell carcinoma different from basil cell carcinoma? 3.06: Understand the functions and disorders of the integumentary system

  35. Disorders of the integumentary system Skin cancer Malignant melanoma • How is malignant melanoma different from the other skin cancers? • How are skin cancers treated? 3.06: Understand the functions and disorders of the integumentary system

  36. Disorders of the integumentary system Skin lesions: Discuss the characteristics of the different skin lesions. 3.06: Understand the functions and disorders of the integumentary system

  37. Disorders of the integumentary system Skin lesions: Compare these types of skin lesions. Macule Papule Pustule Ulcer Vesicle 3.06: Understand the functions and disorders of the integumentary system

  38. Disorders of the integumentary system Skin lesion: Decubitus ulcer • What is an ulcer? • What are decubitus ulcers? • How can they be prevented? • How are they treated? 3.06: Understand the functions and disorders of the integumentary system

  39. Disorders of the integumentary system warts • What causes warts? • Are they contagious? • Can they be prevented? There are many different types! 3.06: Understand the functions and disorders of the integumentary system

  40. Essential Questions: • What are the functions of the integumentary system? • What are some disorders of the integumentary system? • How are integumentary system disorders treated? • How do you relate the integumentary system to the body’s communication systems? 3.06: Understand the functions and disorders of the integumentary system

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