Chapter 3 - Tissues Flashcards
What are tissues?
A group of similar cells that work together to perform different functions.
4 types of tissue?
Epithelial, connective, muscle, and neural.
Epithelial tissue characteristics?
Covers all body surfaces, cellularity, polarity, attachment, avascularity, and regeneration.
Functions of epithelial tissue?
Physical protection, control permeability, sensation, secreations.
What is cellularity?
Made of cells
Are there blood vessels in epithelial tissue?
No.
Polarity means?
Has extremes, one end exposed other is not.
What is the basal side?
Attached side or basement.
What is the lateral side?
To the side (cell junctions).
What is the apical side?
The top or apex.
Where does the basal surface attach?
Basal lamina (basement membrane).
What does lamina lucida mean?
Clear layer.
What does lamina densa mean?
Dense layer.
Where does the basal lamina exist?
On top of the connective tissue.
Purpose of simple epithelium?
Secretion & absorption.
Purpose of stratified epithelium?
Protection.
Purpose of pseudostratified epithelium?
Protection.
Cell shapes?
Squamous (flat), cubodial (cubed shape), columnar (tall cylindrical), and transition (can change shape).
Cell layers?
Simple (single layer), stratified (two or more layers), pseudostratified (single layer appear stratified).
Simple squamous structure, function, and location?
One layer of thin, flat, irregular cells. Absorption, diffusion, and reduce friction. Blood vessels and lungs.
Simple cubodial structure, function, and location?
One layer, hexagonal box shaped cells. Absorption, secretion, limited protection. Glands and ducts.
Simple columnar structure, function, and location?
One layer, column shaped. Protection, absorption, and secretion. Stomach, intestine and gallbladder.
Pseudostratified columnar structure, function, and location?
One layer, multi-shaped cells, nuclei at varied heights. Protection and secretion. Respiratory tract.
Stratified Squamous structure, function, and location?
Thin, flat, irregular shaped cells, and multiple layers. protection against abrasion. Skin and mouth.