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Anatomy 3
Chapter 4, part II
| Term | Definition |
|---|---|
| epithelial tissue | lines and covers surfaces , packed together (lots of cells) |
| What are the main functions of epithelial tissue? | selective barrier for the movement of materials, release products, provides barrier as protection from environment |
| apical (free) surface | faces the outside |
| lateral surface | touches other cells |
| basal surface | opposite of apical surface, faces the bottom |
| basement membrane | thin double extracellular layer that can be attached to and support the epithelial tissue |
| glandular epithelium | secretory glands (ex: sweat and thyroid) |
| simple (layer) | single layer of cells (secretion and diffusion) |
| pseudostratified (layer) | looks like stratified but only has one layer, nuclei at different layers |
| stratified (layer) | two or more layers, acts as protection and barrier (skin) |
| squamous (shape) | thin cells, like floor tiles (fast transport) |
| cuboidal (shape) | square/cube shape , may have microvilli (secrete and absorb) |
| columnar (shape) | taller than wide, may have microvilli or cilia (secretion, absorption, motion) |
| transitional (shape) | cells change shape, only found in urinary bladder |
| simple squamous epithelium | one layer of thin cells (involved in movement) endothelium- lines blood vessels mesothelium- lines body cavities |
| simple cuboidal epithelium | one layer of cube shaped cells, on connective tissue |
| non-ciliated simple columnar epithelium | one layer of rectangle cells with goblet cells and microvilli |
| microvilli | finger like and sticks up from cells, increases surface area |
| goblet cells | secret mucus |
| ciliated simple columnar epithelium | one layer of rectangle cells with goblet cells and cilia |
| cilia | moves fluids and things in one direction |
| non-ciliated pseudostratified columnar epithelium | one layer of columned cells with nuclei at varying levels with microvilli, all attach to basement floor |
| ciliated pseudostratified columnar epithelium | one layer of columned cells with nuclei at varying levels with cilia, all attach to basement floor |
| stratified squamous epithelium (keratinized or non-keratin) | 2+ layers and closest to the apical surface |
| keratinized | skin |
| nonkeratinized | inside the body |
Created by:
bellai
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