Lecture 26 � Histology � Epithelial Tissue

Lecture 26 � Histology � Epithelial Tissue -...

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Lecture 26 – Histology – Epithelial Tissue A. Introduction – we are multicellular (may have billions of cells, depending on our size, but they are different kinds of cells); you can see that the cells have different structure, and different functions, different embryonic origin (but you can’t tell this by looking at it) 1. Somatic cells – most of our cells are these body cells (non reproductive); we have millions of these and there are different kinds 2. Tissues – groups of cells that have a similar structure, function, and embryonic origin 3. Histology – the study of tissues 4. Classification of tissues – 4 major groups 1) Epithelial - skin 2) Connective – tendons, bones, blood (vascular tissue) 3) Muscular 4) Nervous 5. Higher levels of organization – kind of like classification Tissue Organ (a group of tissues that function together for a specific purpose) System (a group of organs that function together for a specific purpose) Individuals B. Epithelial tissue 1. Definition – covers the surface of the body, all the organs, and the lining of the body - Includes skin, coelom, vascular system, respiratory system, urogenital system, digest
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Lecture 26 � Histology � Epithelial Tissue -...

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