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Biol 121 Chpt 4 Part 2 notes.docx - Biol 121 Chpt 4 Part 2...

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Biol 121 Chpt 4 Part 2From last time …3. classification of epithelial tissue (Fig 4.5)A. layers(i) simple – single layer of cells(ii) stratified – multiple layers of cells(iii) pseudostratified – a single layer of cells that map appear multi-layered** notice how the nuclei are at different vertical positions – this leads to thefalse stratification effectB. cell shape(i) squamous – thin, flat, pancake-like cells(ii) cuboidal – similar to “ice-cubes”(iii) columnar – calls have a rectangular / cylindrical appearance to themExample of how to study tissue – Nonciliated Simple Columnar Epithelium1. take a look at the name/title of the tissue – breakdown every word in the titleA. nonciliated – no cilia presentQ? What is cilia? (from the textbook glossary) Tiny hairs that project from the cell andcan be used to move cells or to move substances along the surface of the cellB. simple – a single layer of cellsC. columnar – the cells have a rectangular elongated shapeD. epithelium – take a look at the title of the table– this is a surface / covering epithelium2. make visual observations of the tissueA. Notice there are two types of cells present

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Term
Spring
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Collagen

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