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Chapter 4
Tissues
10
Anatomy
Undergraduate 2
04/17/2015

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Term
What is a tissue?
Definition
A group of cells that function together to carry out specialized activities.
Term
What is histology?
Definition
The science that deals with the study of tissues.
Term
Types of tissues?
Definition
Epithelium
Connective
Muscle
Nervous
Term
Epithelia
Definition
No spaces between cells
covers body surfaces and lines hollow organs, body cavities, ducts, and forms glands.
Term
Tight junctions
Definition
Web-like strands of transmembrane proteins.
Seal off passageways between adjacent cells.
Common in stomach, intestines, and bladder.
Term
Adherens Junctions
Definition
Dense layer of proteins called plaque.
Resist separation of cells during contractile activities.
Term
Desmosomes
Definition
Attach adjacent cells together.
Prevent epidermal cells from separating under tension and cardiac muscles cells from pulling apart during contraction.
Term
Hemidesmosomes
Definition
Resemble half a desmosome.
Do not link to adjacent cells but anchor to basement membrane.
Term
Gap Junctions
Definition
Connect neighboring cells via tiny fluid-filled tunnels called connexons.
Term
Connexins
Definition
Membrane proteins
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