Tissues Four major tissue types 1.Epithelium 2.Connective 3.Muscle 4.Nervous 3/14/20161

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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 Simple (one layer) Stratified (more than one layer) Transitional (cells change shape) 3/14/20163

Simple Epithelium Simple squamous Simple cuboidal Simple columnar Pseudostratified 3/14/20164

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Simple Squamous 3/14/20166

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Simple Cuboidal 3/14/201622

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Simple Columnar 3/14/201627

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Pseudostratified Columnar 3/14/201633

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Stratified Epithelium Stratified squamous Stratified cuboidal Stratified columnar (rare) Transitional 3/14/201642

Stratified Squamous 3/14/201643

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Stratified Cuboidal 3/14/201651

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Transitional 3/14/201655

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Stratified Columnar 3/14/201660

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Connective Tissues 1. Loose or areolar 2. Dense irregular 3. Dense regular 4. Elastic 5. Reticular 6. Adipose 7. Cartilage Hyaline Elastic Fibrocartilage 8. Blood 9. Bone 3/14/201663

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Loose (Areolar) Connective Tissue 3/14/201666

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Dense Irregular Connective Tissue 3/14/201675

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Dense Regular Connective Tissue 3/14/201680

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Elastic Connective Tissue 3/14/201685

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 3/14/201686

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Reticular Connective Tissue 3/14/201690

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Adipose Tissue 3/14/201694

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Hyaline Cartilage 3/14/201698

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