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Types of Tissue • Epithelial Tissue • Connective Tissue • Muscle Tissue • Nervous Tissue 1 Properties of Epithelia • Cellularity • Polarity • Avascularity • Regeneration 2 Epithelial Tissue Stratified squamous epithelium Cuboidal epithelium Simple columnar epithelium Simple squamous epithelium Pseudostratified columnar epithelium 3 Apical surface Basal surface 40 µm Basal lamina Polarity of epithelia 4 5 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. (a) Classes of epithelium Simple Pseudostratified columnar Stratified (b) Cell shapes Squamous Cuboidal Columnar 6 7 8 9 10 11 12 13 14 Constituents of Connective Tissues 1. Cells A. Blasts B. Cytes C. Clasts 2. Extracellular Matrix A. Ground Substance B. Fibers I. Collagenous II. Elastic III. Reticular 15 16 Connective Tissue Loose connective tissue Blood Collagenous fiber Plasma 55 µm 120 µm White blood cells Elastic fiber Red blood cells Cartilage Fibrous connective tissue 30 µm 100 µm Chondrocytes Chondroitin sulfate Nuclei Adipose tissue Central canal Fat droplets Osteon 150 µm 700 µm Bone 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Muscle Tissue Skeletal muscle Nuclei Muscle fiber Sarcomere 100 µm Smooth muscle Nucleus Muscle fibers Cardiac muscle 25 µm Nucleus Intercalated disk 50 µm 34 35 36 37 38 Nervous Tissue Neurons Glia Glia 15 µm Neuron: Dendrites Cell body Axons of neurons 40 µm Axon Blood vessel (Fluorescent LM) (Confocal LM) 39 40 41
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