Unit 3 Seminar The Integumentary System and Body Membranes Chapter 6 Thibodeau Amy J. Hilbelink Ph.D.

Classification of body membranes  Epithelial  Connective

Classification of body membranes  Epithelial Cutaneous membrane Cutaneous membrane Serous membrane Serous membrane Mucous membrane Mucous membrane  Connective

Functions of Skin  Protection  Temperature regulation  Sense organ activity  Let’s discuss how the skin does this…

Serous membranes  Visceral = covers the surface of organs found in body cavities.  Parietal = lines the wall of a body cavity, much like wallpaper covers the walls of a room

Serous membranes  Found only on surfaces within closed cavities. Transverse - section from below

Mucous membranes  They line body cavities that open to the exterior of the body.  The mucus keeps the area moist and lubricated.  So, where in the body are they found?

Mucous membranes are found in….  Respiratory tract  Digestive tract  Urinary tract  Reproductive tract  Note that the secretion is spelled mucus and the membrane is spelled mucous.

Did you know that skin has appendages?  Hair  Receptors (two kinds of receptor corpuscles)  Nails  Skin glands Sudoriferous = sweat Sudoriferous = sweat Eccrine and apocrineEccrine and apocrine Sebaceous glands = microscopic Sebaceous glands = microscopic

Functions of Skin  Protection  Temperature regulation  Sense organ activity  What would happen in a burn situation?

Degrees of burns  1 st degree Minor discomfort to epidermis, does not blister Minor discomfort to epidermis, does not blister  2 nd degree Involves deep epidermal layers and damage to upper layers of dermis. Involves deep epidermal layers and damage to upper layers of dermis.  3 rd degree Complete destruction of the epidermis and dermis. May require skin grafting or amputation of limbs. Complete destruction of the epidermis and dermis. May require skin grafting or amputation of limbs.

Classification of burns 1. Depth and number of tissue layers involved 2. Total body surface area affected 3. Type of homeostatic mechanisms, such as respiratory or blood pressure control and fluid electrolyte balance, that are damaged or destroyed.

Estimating body surface

Matching exercise 1. Melanin 2. Epithelial membrane 3. Pacinian corpuscle 4. Sebaceous 5. Waterproofing 6. Hair 7. Lunula 8. Connective tissue membrane 9. Dermal papillae 10. Sudoriferus  A. Fingerprint  B. Pressure  C. Brown pigment  D. Pleura  E. Synovial membrane  F. Perspiration  G. Oil  H. Follicle  I. Keratin  J. Little moon

Answers – how did you do?  1. C  2. D  3. B  4. G  5. I  6. H  7. J  8. E  9. A  10. F

Weblinks  Burns  ml ml ml  Dermatology image bank  ag.htm ag.htm ag.htm

Any questions  ???