ANFS241 Lecture Notes - Lecture 2: Abdominal Wall, Ergot, Weight-Bearing
27 Mar 2018
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Common integument: skin, hair, skin glands (including mammary), claws, hooves and horns. Skin thin organ covering the body. Protecting underlying tissues from injury, drying and bacterial invasion. Excretes water and salts through sweat glands. Stratified - two or more cell layers. Always named for the type of cel on the surface. Squamos - width is greater than the height (short and flat) Cubodial - width, depth and height are all about the same. Columnar - height is greater than the width. Stratum basale - single cell thick, cuboidal or columnar cells, attached to the basement membrane at the very bottom of the epidermis. Stratum spinosum - polyhedral cells, thickness varies depending on region of the body. Stratum germinativum (s. basale and: spinosum together) Stratum granulosum - squamos cells degenerating - have keratohyalin granules that will make keratin. Stratum lucidum - (not always present) - flat, dead squamos cells containing eleidin (clear pre-cursor to keratin)
