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histology.doc - Chapter 5 (Histology) 1. Define Cell,...

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Chapter 5 (Histology)1.Define Cell, Tissue, and Organ..
2.Origin of tissues
List of a few organs arising from these layers:
3.Types of tissues
4.Functions & characteristics ofepithelial tissueand a description of its types.
1
B. Characteristics:i. Single or multiple layers of closely packed cells w/ almost no matrix.ii. Has an apical surface (open to the environment or body space).iii. Other surface is the basal surface - sits on a layer of connective tissue.Between the epithelium and connective tissue layers is a thin, noncellular layercalledbasement mem.iv. Covers body surface and organs. (covers outer surfaces).v. Lines inner surfaces of ……………………………….vi. Doesn’t have any blood supply (avascular). Gets nourishment from ………?vii.Have nerve supply.viii.Have a high capacity for renewal.ix.Derived from all 3 germ cell layers.C.Classification of epithelial tissue:I. Simple(one layer): all cells touch the basement mem. Types:i. S. squamousii. S. cuboidalNote: Goblet cells in betweeniii. S. columnarS. columnar & Pseu. St. producesiv. Pseudostratified ciliated columnarprotective mucus coating.(Location, function, & a short description of each type will be covered in the lab.Questions will be asked in the lecture too.)II. Stratified(2 – many layers): all cells do not touch the basement mem. Types:i. St. squamous – most widespread epithelium in the body. 2 types:a.Keratinized st. sq.– found in skin / epidermis. Covered w/ layers of dead,keratin containing cells.

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Term
Winter
Professor
PARKER

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