Cell Junctions
Contact points between the plasma membranes of tissue cells
Types of Cell junctions(5)
Tight Junctions, Adherens Junctions, Desmosomes, Herhidemosomes, and Gap Junctions
Gap Junction
Connexons connect neighboring cells to rapidly move energy or electricity to other cells.
"Tunnels"
Tissue
Group of similar cells that predom specific functions
Types of tissues
Epithelial, Connective, Nervous, and muscular
Epithelium Tissue
Closely packed cells arranger in continuous sheets that form the outer covering of body, line
body cavities and cover some internal organs. Avascular, and reproduce readily.
Apical Surface
Surfaces faces body surface- internally or externally.
Basal Surface
Opposite of Apical surface- adheres to basement membrane
Basement membrane
Basal lamina and reticular lamina
Vascular/Avascular
Not own nerve supply/Own nerve supply
, Epithelial classification
Number of layers(Simple Vs. Stratified) and shape (Squamous Vs. Cuboidal Vs. Columnar)
Simple
Single layer of cells. Allow for diffusion, osmosis, secretion, excretion, absorption, filtration.
Stratified
For protection (skin), multiple layers on top of each other
Pseudostratified
Pseudo-false. Looks like multiple layers but all cells are touching basal surface.
Squamous
Thin and flat
Cuboidal
Cube shaped
Contact points between the plasma membranes of tissue cells
Types of Cell junctions(5)
Tight Junctions, Adherens Junctions, Desmosomes, Herhidemosomes, and Gap Junctions
Gap Junction
Connexons connect neighboring cells to rapidly move energy or electricity to other cells.
"Tunnels"
Tissue
Group of similar cells that predom specific functions
Types of tissues
Epithelial, Connective, Nervous, and muscular
Epithelium Tissue
Closely packed cells arranger in continuous sheets that form the outer covering of body, line
body cavities and cover some internal organs. Avascular, and reproduce readily.
Apical Surface
Surfaces faces body surface- internally or externally.
Basal Surface
Opposite of Apical surface- adheres to basement membrane
Basement membrane
Basal lamina and reticular lamina
Vascular/Avascular
Not own nerve supply/Own nerve supply
, Epithelial classification
Number of layers(Simple Vs. Stratified) and shape (Squamous Vs. Cuboidal Vs. Columnar)
Simple
Single layer of cells. Allow for diffusion, osmosis, secretion, excretion, absorption, filtration.
Stratified
For protection (skin), multiple layers on top of each other
Pseudostratified
Pseudo-false. Looks like multiple layers but all cells are touching basal surface.
Squamous
Thin and flat
Cuboidal
Cube shaped
