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The study of tissues
Histology
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The four major tissue types
- Epithelial Tissue
- Connective Tissue
- Muscle Tissue
- Nervous Tissue
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The three types of Intercellular Junctions
- Tight Junctions
- Desmosomes
- Gap Junctions
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Junction with close space between cells
Located among cells that form linings
Tight Junctions
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Form "spot welds" between cells
Located among outer skin cells
Desmosomes
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Junction that has tubular channels between cells
Located in cardiac muscle cells
Gap Junctions
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Single layer of flat cells
Line air sacs, blood vessels, lymphatic cells
Simple Squamous Epithelial
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Single layer of cube-shaped cells
Lines kidney tubules and ducts of some glands
Covers ovaries
Simple Cuboidal Epithelial
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Single layer of elongated cells
Nuclei usually near the basement
Line uterus, stomach, intestines
Simple Columnar Epithelial
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Single layer of elongated cells
Appear striated
Line respiratory passageways
Pseudostratified Columnar Epithelial
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Many cell layers
Lines oral cavity, vagina, anal canal
Stratified Squamous Epithelial
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2-3 Layers of cube-shaped cells
Line ducts of mammary glands, sweat glands, salivary glands and the pancreas
Stratified Cuboidal Epithelial
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Top layer of elongated cells
Line part of male urethra and part of pharynx
Stratified Columnar Epithelial
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Many cell layers
Cube-shaped and elongated cells
Line urinary bladder, ureters, and part of urethra
Transitional Epithelial
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Duct-less glands that produce hormones
Endocrine Glands
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Exocrine glands have ducts, and can come in 2 types
What are the types?
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