Epithelial Tissue Flashcards

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Study Notes

Epithelial Tissue Types

Transitional Epithelium
- Function: Allows for stretching and recoil.
- Location: Found in bladder, vagina, and anus; characterized by cuboidal cells.
Simple Cuboidal Epithelium
- Function: Primarily for secretion and absorption.
- Location: Present in kidney tubules and thyroid gland.
Simple Columnar Epithelium
- Function: Involved in absorption and secretion.
- Location: Lines stomach, intestines, gallbladder, and uterine ducts.
Simple Squamous Epithelium
- Function: Facilitates absorption, diffusion, and reduces friction.
- Location: Covers capillary walls, eyes, and lung alveoli.
Stratified Squamous Epithelium - Keratinized
- Characteristic: Tough, water-resistant layer that protects against abrasion and dehydration.
- Location: Found in hair, nails, and skin.
Stratified Squamous Epithelium - Non-keratinized
- Function: Resists abrasion but susceptible to drying.
- Location: Lines pharynx, esophagus, anus, and vagina.
Stratified Cuboidal Epithelium
- Function: Engages in secretion and absorption.
- Location: Present in sweat glands and mammary glands.
Stratified Columnar Epithelium
- Function: Functions in absorption and secretion.
- Location: Found in salivary glands and pancreas.
Pseudostratified Columnar Epithelium
- Function: Involved in absorption and secretion.
- Location: Lines male reproductive tract, trachea, and nasal cavities.

Functions and Characteristics of Epithelia

Epithelia
- Composed of skin and both exocrine and endocrine glands.
- Covers exposed surfaces and protects against physical damage.
- Responsible for selective absorption and secretion.
- Provides sensation and lines internal cavities and passageways.
Exocrine Glands
- Secrete substances onto external surfaces or into ducts.
Endocrine Glands
- Secrete hormones directly into the bloodstream for systemic distribution.
Neuroepithelium
- Specialized sensory epithelium located in specific sense organs.

Structural Components of Epithelial Tissue

Apical Surface
- The surface facing the exterior of the body or internal cavities; the topmost layer.
Base
- The surface that is anchored to underlying tissues.
Basolateral Surface
- Incorporates both the base and the lateral sides of epithelial cells.
Polarity
- Refers to the structural and functional differences between the exposed (apical) and attached (basolateral) surfaces.
Lumen
- The inner space of a tubular structure within the body.
Mesothelium
- A type of simple squamous epithelium that lines the ventral body cavities.
Endothelium
- A specialized simple squamous epithelium that lines the interior of the heart and blood vessels.

Description

This quiz encompasses key types of epithelial tissue, providing definitions, functions, and locations for each type. Flashcards cover Transitional Epithelium, Simple Cuboidal, Simple Columnar, and Simple Squamous tissues among others. Perfect for students looking to strengthen their understanding of histology.