Define Tissue:
A group of cells that work together to perform a specific function
Tissues are the building blocks of organs and systems in the body.
List the 4 major types of tissues:
- Epithelial
- Connective
- Muscle
- Nervous
Each type of tissue has distinct structures and functions.
What are the 5 general characteristics of Epithelial Tissue?
- Cellularity
- Polarity
- Attachment
- Avascularity
- Regeneration
These characteristics define the structure and function of epithelial tissues.
Epithelial tissue can be classified by?
Cell shape and number of layers
Common classifications include squamous, cuboidal, and columnar shapes, as well as simple and stratified layers.
What is the function of glandular epithelium?
Secretion of substances
Glandular epithelium forms glands that produce hormones, enzymes, and other secretions.
Draw the following basic Epithelial Tissue shapes: Squamous, Cuboidal, Columnar
Squamous: flat cells
Cuboidal: cube-shaped cells
Columnar: tall, column-like cells
These shapes are important for the specific functions of epithelial tissues.
Cell Type: Squamous
Flat, thin cells
Squamous cells are often found in areas where diffusion or filtration occurs.
Cell Type: Cuboidal
Cube-shaped cells
Cuboidal cells are typically involved in secretion and absorption.
Cell Type: Columnar
Tall, column-like cells
Columnar cells often have microvilli or cilia and are involved in absorption and secretion.
Cell Type: Ciliated
Cells with hair-like structures (cilia)
Ciliated cells help move substances across the epithelial surface.
Cell Type: Transitional
Cells that can change shape
Transitional cells are found in the bladder and allow for stretching.
Cell Type: Stratified
Multiple layers of cells
Stratified epithelial tissues provide protection in areas subject to abrasion.
Cell Type: Simple
Single layer of cells
Simple epithelial tissues are involved in absorption, secretion, and filtration.
