Tissues Four major tissue types 1 Epithelium 2
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Tissues • Four major tissue types 1. Epithelium 2. Connective 3. Muscle 4. Nervous 3/4/2021 1
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Classification of Epithelial Tissues • Two simple rules 1. Shape of cells (always check the most superficial layer) • • Squamous (plate-like) Cuboidal Columnar Pseudostratified (appears to be multiple layers) 2. Number of layers • • • 3/4/2021 Simple (one layer) Stratified (more than one layer) Transitional (cells change shape) 3
Simple Epithelium • Simple squamous • Simple cuboidal • Simple columnar • Pseudostratified
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Simple Squamous 3/4/2021 6
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Simple Cuboidal 3/4/2021 22
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Simple Columnar 3/4/2021 27
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Pseudostratified Columnar 3/4/2021 33
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Stratified Epithelium • Stratified squamous • Stratified cuboidal • Stratified columnar (rare) • Transitional
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Stratified Cuboidal 3/4/2021 51
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Transitional 3/4/2021 55
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Stratified Columnar 3/4/2021 60
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• Connective Tissues 1. 2. 3. 4. 5. 6. 7. Loose or areolar Dense irregular Dense regular Elastic Reticular Adipose Cartilage • • • Hyaline Elastic Fibrocartilage 8. Blood 9. Bone 3/4/2021 63
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Loose (Areolar) Connective Tissue 3/4/2021 66
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Dense Irregular Connective Tissue 3/4/2021 75
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Dense Regular Connective Tissue 3/4/2021 80
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Elastic Connective Tissue 3/4/2021 85
Elastic Connective Tissue • Relatively rare • But relatively high concentration in several organs including the largest arteries • This image shows a portion of the wall of the aorta • Elastin fibers important in the recoil of organs like arteries and lungs 3/4/2021 86
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Reticular Connective Tissue 3/4/2021 90
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Adipose Tissue 3/4/2021 94
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Hyaline Cartilage 3/4/2021 98
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Elastic Cartilage 3/4/2021 103
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Fibrocartilage 3/4/2021 107
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Blood 3/4/2021 113
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Bone 3/4/2021 116
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Striated or Skeletal 3/4/2021 122
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Cardiac 3/4/2021 132
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Smooth 3/4/2021 140
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Nerve Cell 3/4/2021 150
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Neuron 3/4/2021 153
