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Questions and Answers
What type of epithelium is characterized by a single layer of flat cells and is involved in forming membranes and lining body cavities?
What type of epithelium is characterized by a single layer of flat cells and is involved in forming membranes and lining body cavities?
- Stratified squamous
- Simple cuboidal
- Simple squamous (correct)
- Simple columnar
Which type of epithelial tissue is primarily found lining the digestive tract and may contain mucus-producing cells?
Which type of epithelial tissue is primarily found lining the digestive tract and may contain mucus-producing cells?
- Pseudostratified columnar
- Simple columnar (correct)
- Transitional
- Stratified cuboidal
What is the main function of stratified squamous epithelium, and where is it commonly found?
What is the main function of stratified squamous epithelium, and where is it commonly found?
- Secretion; kidneys
- Diffusion; blood vessels
- Absorption; intestines
- Protection; skin and esophagus (correct)
Which type of epithelium features a single layer of cells that appear stratified due to varying cell heights, often functioning in secretion and absorption?
Which type of epithelium features a single layer of cells that appear stratified due to varying cell heights, often functioning in secretion and absorption?
Which type of epithelial tissue is distinguished by its ability to change shape when stretched, and is primarily found in the urinary system?
Which type of epithelial tissue is distinguished by its ability to change shape when stretched, and is primarily found in the urinary system?
Flashcards
Simple squamous epithelium
Simple squamous epithelium
A single layer of flattened cells that forms membranes and lines body cavities, lungs, and blood vessels.
Simple cuboidal epithelium
Simple cuboidal epithelium
A single layer of cube-shaped cells, commonly found in glands, kidneys, and ovaries.
Simple columnar epithelium
Simple columnar epithelium
A single layer of tall, column-like cells often containing mucus-producing cells, lining the digestive tract.
Pseudostratified columnar epithelium
Pseudostratified columnar epithelium
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Stratified squamous epithelium
Stratified squamous epithelium
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Study Notes
Epithelial Tissue
- Cells tightly packed, forming sheets
- Supported by a basement membrane
- Avascular (lacks blood vessels)
Epithelial Naming Conventions
- First name: Based on the number of cell layers
- Simple: single layer
- Stratified: multiple layers
- Second name: Based on cell shape
- Squamous: flattened
- Cuboidal: cube-shaped
- Columnar: column-like
Simple Epithelia
- Simple squamous:
- Single layer of flat cells
- Forms membranes lining body cavities (e.g., lungs, blood vessels)
- Simple cuboidal:
- Single layer of cube-shaped cells
- Found in glands, kidneys, and ovaries
- Simple columnar:
- Single layer of tall cells
- Often contains mucus-producing cells
- Lines the digestive tract
- Pseudostratified columnar:
- Single layer, but cells vary in height, giving a false impression of multiple layers
- Often involved in absorption or secretion
Stratified Epithelia
- Classified by the shape of surface cells
- Stratified squamous:
- Surface cells are flattened
- Provides protection where friction is common (e.g., skin, mouth, esophagus)
- Stratified cuboidal:
- Two or more layers of cube-shaped cells
- Found in ducts of some large glands
- Stratified columnar:
- Surface cells are columnar; underlying cells vary in shape and size
- Primarily found in large gland ducts
Transitional Epithelium
- Cell shape changes depending on the degree of stretching
- Lines organs of the urinary system
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