Lecture 1 tissues

Lecture 1 tissues - II. Tissues This is basic background to...

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This is basic background to the rest of anatomy and physiology. Definition: - a group of cells with a common structure and function. Four main tissue types: 1. Epithelial [Fig. 20.4, p. 416] - cover surfaces (example: skin) - this surface may be very complicated. For example: - lining the inside of the gut - lining the ducts inside the pancreas. - secrete stuff. Examples are sweat, oils (on the skin), or digestive enzymes (in the gut /and or pancreas). On one side this tissue is free, on the other it is attached to a basement membrane which connects it to underlying tissues. Epithelial tissues are classified based on: - shape: cuboidal, columnar or squamous. - # of layers: simple, pseudostratified [Fig., not in book] , stratified. 2. Connective [Fig. 20.5, p. 417] . - consist of cells surrounded by non-living matrix. - six basic types: - loose connective tissue - loose collagen fibers. Holds tissues and organs in place. - adipose- stores fat (energy & insulation)
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Lecture 1 tissues - II. Tissues This is basic background to...

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