Bio47S11HO05

Bio47S11HO05 - Biology 47 Human Anatomy Lecture 5...

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1 Biology 47 - Human Anatomy Lecture 5 Histology (Membranes & Integument) Membranes : Continuous sheets of tissue comprised of : a. b. Membranes : Cover, line & protect 4 Membrane Types : 1. Serous Membranes : Structure : a. b. Function : Diffusing tissue fluid through the membrane Location : Line: a. Mesothelium : Line or cover : Diffusing tissue fluid through mesothelium : b. Endothelium : Line interior of : Diffusing tissue fluid through blood vessel : 2. Mucous Membrane ( mucosa ) Structure : a. b. Location : Line passages open to the body’s: Function : Secretions produce: ie Mucus, urine, semen, saliva
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2 3. Synovial Membrane : Structure : a. Discontinuous : b. Location : Line & enclose : Knee, elbow, shoulder, hip Function : Secrete : Lubricate : 4. Cutaneous Membrane : Structure : a. Epidermis : Epi = “Above” ; Derma = “skin” b. Connective Tissue Dermis Location : Covers : Function : Integumentary System : Skin integumentum = “covering” Organ System : Forming a continuous : Contains ALL : 2 Components : a. b. Hair follicles, nails, glands, nerves, blood vessels etc. Cutaneous Membrane : 1. Epidermis :
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3 Cellular Composition : 4 cell types a. Keratinocytes : 90% Function : produce Keros = Protect against : Thick Skin : b. Basal Cells Stem Cells ” : <1% Location: Function: c. Melanocytes : 6% Melanin melan = “black” Function : Protection from : Color surrounding: d. Langerhans Cells : 3 – 8% Function: Initiate e. Merkel Cells
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Bio47S11HO05 - Biology 47 Human Anatomy Lecture 5...

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