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Tissues Definitions

Crash Course Tissues #2 (epithelial)

QuestionAnswer
What is the job of epithelial tissue? It lines, covers, & generally organizes your body, creating order from what would be chaos
Proper epithelium definition Covers & lines your outer & inner body & organizes everything into separate units
Glandular epithelium definition Forms glands & secretes hormones & other substances
Invagination definition The action or process of being turned inside out or folded back on itself to form a cavity or a pouch
Avascular definition Not associated with or supplied with blood vessels
Jobs of squamous cells Absorption, secretion, filtration, protection, transportation, & diffusion
Jobs of cuboidal cells Absorption, protection, & secretions
Jobs of columnar Cells Protection & secretion
Why are squamous cells flat? It makes it easier for oxygen to move across them & to the other side
Why are columnar & cuboidal cells so large? It takes a lot of room to make & secrete mucus
Pseudostratified description Mostly one layer of cells, but the cells are different shapes, types, & sizes
Does epithelial tissue regenerate quickly? Yes
Apical definition Upper side of a tissue, exposed to either the outside of the body or the outside of whatever organ it’s covering
Basal definition Tightly attached to the basement membrane, never opens to outside world
Basement membrane definition Collagen fibers that helps hold the epithelium together, & anchors it to the next deeper layer, your connective tissues
Glands are largely made up of what? Epithelial tissue; that’s why our glands secrete sweat, mucus, hormones, & enzymes
What are the 2 types of glandular epithelium? Endocrine & exocrine glands
Endocrine gland definition They secrete hormones right into your bloodstream out to nearby cells
Exocrine gland definition They secrete their juices into tubes or ducts that lead to the outside of your body, rather than into the blood
Are epithelial tissues polar or non-polar? Polar, meaning that there are a sides; apical & basal
Created by: kresidori29
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