Transcript Baby Blues
Integumentary System Read pp 96-111: HW: pg 114 S/A #1, 4, 6, 7, 12, 13 Clinic ?’s: #3, 5, 6 Epithelial Membranes contain an epithelial sheet, always combined with connective tissue 137.222.110.150/calnet/cellbio/page8.htm Epithelial tissue types • Cutaneous—skin –exposed to air = dry membrane www.acponline.org Epithelial tissue types • Serous— –line internal cavities (never exposed to outside) –serous fluid (excreted by both epithelial and connective tissues), reduction of friction Types of serous membranes: • Parietal—lines a specific wall of ventral body cavity. • Visceral—covers the outside of the organs of the ventral body cavity. academic.kellogg.cc.mi.us Epithelial tissue types • Mucous –lines all body cavities that open to exterior = wet membranes www.hopkinsmedicine.org Connective Tissue Membranes (aka synovial) www.pennhealth.com • line areas surrounding joints, bursae (sacs of connective tissue) & tendon sheaths. Epithelial membrane Functions • Protects deeper tissues from –mechanical damage –chemical damage –bacterial damage –UV radiation –thermal damage –dessication Epithelial membrane Functions • Temperature regulation • Aids in excretion of urea and uric acid • Synthesizes vitamin D • Sensory input • Controls permeability Layers of the cutaneous membrane • 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 • Hypodermis—layer of fat www.aboutadvice.com Appendages of the skin www.mc.vanderbilt.edu • Hair—guard head, eyes, respiratory tract, insulation • Receptors • Nails—scalelike modification of epidermis; transparent Appendages of the skin • Skin glands – Sweat/sudoriferous glands-- > 2.5 million! www.scf-online.com • eccrine—produce sweat, found all over • apocrine—usually found in axillary and genital areas; milky secretions; precise function is unknown. Appendages of the skin • Sebaceous glands—oil glands – not on palms or soles of feet, ducts usually empty into a hair follicle. www.acne-resource.org Skin Disorders or Problems • Herpes simplex –cold sores, fluid filled blisters www.mummila.net www.004.cz www.dartmouth.edu Skin Disorders or Problems www.uzleuven.be • Cyanosis –poor blood circulation; turning skin/blood bluish Skin Disorders or Problems • Acne— infection of sebaceous glands www.myzeno.com Skin Disorders or Problems • Skin cancer –most common cancer www.pueblo.gsa.gov www.cbc.ca www.helenafamilypodiatry.com Skin Disorders or Problems • Athlete’s foot –itchy, red, peeling condition between toes; fungal infection www.cmsp.com bms.brown.edu orpreform.typepad. om Skin Disorders or Problems • Third degree burns –body loses fluid, destroys entire thickness of skin, can lead to infection. Skin Disorders or Problems • Blister www.parktrust.org –friction between epidermis and dermis causes separation of the layers.