Lab 3 Flashcards
Tissues
Groups of cells and cell products of similar structure and embryonic origin
Histology
The study of tissues
Four major classes of tissues
Epithelial
Connective
Muscle
Nervous
Epithelium
Tissue composed of tightly bound cells that covers or lines all external and internal body surfaces and forms glands
Avascular
No blood vessels
Types of epithelial cells
Squamous
Cuboidal
Columnar
Squamous cells
Flat and scale-shaped
Cuboidal cells
Resemble cubes
Columnar cells
Rectangular or column-shaped
Simple epithelial tissue
Single layer is cells
Stratifies epithelial tissues
Multiple layers of cells
Simple squamous epithelium
Description
Function
Location
Single layer of flat,scale like cells
Diffusion and filtration
Lining of central cavity , heart and blood vessels, internal organs, alveoli in lungs
Simple cuboidal epithelium
Description
Function
Location
Single layer of cube shaped cells with round, dark stained nuclei located in center of cells
Secretion and absorption
Glands, ducts, kidney tubules
Simple columnar epithelium
Description
Function
Location
Single layer of rectangular cells with oval shaped nuclei located at the basal end of cell
Secretion and absorption
Lining of digestive tract, gallbladder, uterine tubes and collecting ducts if kidney
Pseudostratified columnar epithelium
Description
Function
Location
Single layer of cells which appear stratified and may have cilia covering apical surface
Protection and secretion
Lining of nasal cavity, trachea, and bronchi and portions of male reproductive tract
