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Integumentary System. Read pp 96-111: HW: pp113-114 S/A #1, 4, 7, 9, 12, 13, 14 Clinic ?’s: #3, 4, 5. 137.222.110.150/calnet/cellbio/page8.htm. Classification of Body Membranes. Epithelial membranes all of these contain an epithelial sheet, always combined with connective tissue.
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Integumentary System Read pp 96-111: HW: pp113-114 S/A #1, 4, 7, 9, 12, 13, 14 Clinic ?’s: #3, 4, 5
137.222.110.150/calnet/cellbio/page8.htm Classification of Body Membranes • Epithelial membranes • all of these contain an epithelial sheet, always combined with connective tissue
www.acponline.org Epithelial tissue con’t: • Cutaneous—skin • exposed to air = dry membrane
Epithelial tissue con’t: • Serous— • line internal cavities • serous fluid (excreted by both epithelial and connective tissues), lets organs slide cross cavity walls and each other
Epithelial tissue con’t: • Parietal—lines a specific wall of ventral body cavity. • Visceral—covers the outside of the organs of the ventral body cavity.
www.hopkinsmedicine.org Epithelial tissue con’t: • Mucous • lines all body cavities that open to exterior = wet membranes
www.pennhealth.com Connective Tissue Membranes • Aka Synovial • line area surround joints, bursae (sacs of connective tissue) & tendon sheaths.
Basic Skin Functions • Protects deeper tissues from • mechanical damage • chemical damage • bacterial damage • UV radiation • thermal damage • dessication
Basic Skin Functions • Temperature regulation • Aids in excretion of urea and uric acid • Synthesizes vitamin D • Sensory input
The Skin—Integumentary System • Epidermis—outer five layers—avascular • Melanin—pigment responsible for reducing skin damage from UV • Dermis—made up of dense connective tissue, “hide”, firmly connected to epidermal layer. Thickness varies
www.mc.vanderbilt.edu Appendages of the skin • Hair—guard head, eyes, respiratory tract, insulation • Receptors • Nails—scale-like modification of epidermis; transparent
www.scf-online.com Appendages of the skin • Skin glands • Sweat/sudoriferous glands-- > 2.5 million! • eccrine—produce sweat, found all over • apocrine—usually found in axillary and genital areas; milky secretions; precise function is unknown.
www.acne-resource.org Appendages of the skin • Sebaceous glands—oil glands • not on palms or soles of feet, ducts usually empty into a hair follicle.
www.mummila.net www.004.cz Skin Disorders or Problems • Herpes simplex • cold sores, fluid filled blisters
www.dartmouth.edu www.uzleuven.be Skin Disorders or Problems • Cyanosis • poor blood circulation; turning skin/blood bluish
www.myzeno.com Skin Disorders or Problems • Acne—infection of sebaceous glands
www.pueblo.gsa.gov www.cbc.ca Skin Disorders or Problems • Skin cancer • most common cancer
www.helenafamilypodiatry.com www.cmsp.com Skin Disorders or Problems • Athlete’s foot • itchy, red, peeling condition between toes; fungal infection
bms.brown.edu corpreform.typepad.com Skin Disorders or Problems • Third degree burns • body loses fluid, destroys entire thickness of skin, can lead to infection.
www.parktrust.org Skin Disorders or Problems • Blister • friction between epidermis and dermis causes separation of the layers.
