BIOSC-139 Lecture Notes - Lecture 24: Aqueous Humour, Urethra, Mucin
26 Aug 2020
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Simple columnar epithelium: single layer of tall, closely packed cells, absorption, secretion, note description, function, location on next slide. Pseudostratified columnar epithelium: cells vary in height, cell nuclei at different levels, appears stratified, but is not, secretion, absorption, note description, function, location on next slide. Stratified epithelial tissues: two or more cell layers, regenerate from below, basal cells divide, cells migrate to surface, more durable than simple epithelia, protection is major role. Stratified squamous epithelium: most widespread of stratified epithelia, free surface squamous; deeper layers cuboidal or columnar, located for wear and tear, those farthest from basal layer (and therefore nutrients) less viable, note description, function, location on next slide. Stratified cuboidal epithelium: quite rare, found in some sweat and mammary glands, typically two cell layers thick. Stratified columnar epithelium: limited distribution in body, small amounts in pharynx, male urethra, and lining some glandular ducts, also occurs at transition areas between two other types of epithelia.
