Bi 103 Tissues and Skin 35 Lecture Outline: Tissues & Skin [Chapters 5, 6, 12 (p. 440441)] Chapter 5: Tissues Def.: Tissue = Fur basic tissue types 1. 2. 3. 4. Epithelial Tissues General Characteristics line bdy cavities, cver rgans and classified accrding t and Classificatin based n cell shape: # f cell layers: Simple squamus epithelium single layer f flattened cells line alveli line bld vessels serus membranes
Bi 103 Tissues and Skin 36 Simple cubidal epithelium single layer f cubeshaped cells Simple clumnar epithelium single layer f elngated cells may pssess,, and /r Pseudstratified ciliated clumnar epithelium (PSCCE) Stratified squamus epithelium tp layer is flat cells can accumulate Stratified cubidal epithelium 23 layers f cubedshaped cells Stratified clumnar epithelium tp layer elngated cells deeper layers are cubidal Transitinal epithelium stratified Glandular Epithelium cmpsed f specialized cells that Endcrine glands:
Bi 103 Tissues and Skin 37 Excrine glands Unicellular Multicellular Types f Glandular Secretins (Excrine) Mercrine fluid prduct Apcrine part f a cell released Hlcrine whle cell released Endcrine glands: Ex. Types f Membranes Serus line bdy cavities that reduce thracic and abdminal cavities secrete Cutaneus Mucus line tubes and rgans that lining f secrete
Bi 103 Tissues and Skin 38 Synvial Cnnective Tissues General Characteristics: Functins cnnect, supprt, prtect lts f matrix usually vascular Cnnective Tissue Cells: Fibrblasts Mast cells Macrphages Cnnective Tissue Fibers: Cllagen Reticular fibers Elastic fibers Cnnective tissue prper: lse CT adipse reticular dense Specialized CT: cartilage bne bld
Bi 103 Tissues and Skin 39 Lse CT (arelar) mstly fibrblasts Adipse tissue adipcytes stre fat Reticular CT reticular fibers supprts rgan walls Dense CT cllagen and elastic fibers tendns, ligaments ( ) dermis ( ) Bne (sseus) tissue hard matrix supprts and prtects Cartilage rigid matrix chndrcytes in
Bi 103 Tissues and Skin 40 3 types: Hyaline cartilage: Elastic cartilage: Fibrcartilage (fibrus): Bld fluid matrix ( ) frmed elements (,, ) Muscle Tissue General characteristics: 3 types: Skeletal muscle: Smth muscle: Cardiac muscle:
Bi 103 Tissues and Skin 41 Nervus Tissue fund in main cells are supprt cells are Clinical Applicatin Cancer Liver Fibrsis Heart Failure and Athersclersis Cllagen Disrders: Chndrdysplasia cllagen chains t wide stunted grwth (epiphyseal (grwth) plates d nt prduce bne nrmally) defrmed jints Marfan syndrme Nt enugh fibrillin (CT prtein) Lng limbs, sunken chest, elngated fingers, weak arta Famus Peple with Marfans
Bi 103 Tissues and Skin 42 Chapter 6: Skin and Integumentary System Functins: Prtectin Retards water lss Regulates Cntains sensry receptrs Synthesis ( ) Excretin Regins f the Skin Epidermis Dermis Subcutaneus regin (hypdermis) lse CT Epidermis thickest n palms and sles melancytes Layers f Epidermis Stratum crneum Stratum lucidum Stratum granulsum Stratum spinsum Stratum basale
Bi 103 Tissues and Skin 43 Dermis cntains dermal papillae Hair Fllicles tubelike depressin hair shaft hair rt hair papillae melanin arrectr pili muscle Nails nail plate nail bed lunula Sebaceus Glands assciated with hair fllicles secretes
Bi 103 Tissues and Skin 44 Sweat (sudriferus) Glands riginate in dermis r hypdermis eccrine apcrine Mdified sweat glands: ceruminus mammary Sense Receptrs (Chap. 12) Exterreceptrs a. Free nerve endings b. Tactile (Meissner s) crpuscles c. Lamellated (Pacinian) crpuscles Regulatin f Bdy Temperature T lwer bdy temperature: [ ] T increase bdy temperature: [ ]
Bi 103 Tissues and Skin 45 Prblems in Temperature Regulatin Hyperthermia (elevated bdy temperature) expsure t sustained high temperatures Treatment: administer liquids, cl the skin fever Treatment: antipyretics (ibuprfen, acetaminphen, aspirin) Hypthermia Skin Clr Genetic Factrs Envirnmental Factrs Physilgic Factrs
Bi 103 Tissues and Skin 46 Life Span Changes Clinical Applicatin