Lecture 3 Sep-8-2011 chapter 4 (1)

Lecture 3 - io 2870 ntroduction to Anatomy and Physiology Chapter 4 The Tissue Level Of Organization 4-1 TISSUE TYPES Bio 2870 A& P 2 The Tissue

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Unformatted text preview: io - 2870 ntroduction to Anatomy and Physiology Chapter 4 The Tissue Level Of Organization 9/8/2011 4-1 TISSUE TYPES Bio 2870 A & P 2 The Tissue Level Of Organization 9/8/2011 4-2 EPITHELIAL TISSUE I. General Information A. Includes Epithelia (Layers Of Cells That Cover Internal Or External Surfaces) & Glands (Produce Fluid Secretions) II. Characteristics A. Cellularity B. Polarity C. Attachment D. Avascularity E. Regeneration Bio 2870 A & P 3 The Tissue Level Of Organization 9/8/2011 III. Functions A. Protection B. Control Permeability C. Sensation D. Produce Secretions i. Glandular Epithelial Tissue 4-2 EPITHELIAL TISSUE Bio 2870 A & P 4 The Tissue Level Of Organization 9/8/2011 4-2 EPITHELIAL TISSUE IV. Specializations Of Epithelial Cells A. Apical Surface i. Microvilli ii. Cilia Bio 2870 A & P 5 The Tissue Level Of Organization 9/8/2011 Microvilli Membrane extensions containing microfilaments Increase Surface Area Of Cell For Absorption CILIA “Beat” move rhythmically to move substances along the cell surface 4-2 EPITHELIAL TISSUE IV. Specializations Of Epithelial Cells B. Lateral Surface 1. Occluding/Tight Junction 2. Gap Junction 3. Desmosome/ Macula Adherens a. Spot Desmosome b. Hemidesmosome Bio 2870 A & P 6 The Tissue Level Of Organization 9/8/2011 4-2 EPITHELIAL TISSUE IV. Specializations Of Epithelial Cells Bio 2870 A & P 7 The Tissue Level Of Organization Cell Junctions Occluding (Tight) junctions — between two plasma membranes Adhesion belt attaches to terminal web Prevents passage of water and solutes Isolates wastes in the lumen Gap junctions — allow rapid communication Held together by channel proteins (junctional proteins,...
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This note was uploaded on 12/14/2011 for the course BIO 2870 taught by Professor Spranger during the Spring '08 term at Wayne State University.

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Lecture 3 - io 2870 ntroduction to Anatomy and Physiology Chapter 4 The Tissue Level Of Organization 4-1 TISSUE TYPES Bio 2870 A& P 2 The Tissue

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