Tissues 1 Flashcards
What 5 things are we made of?
Cells Extracellular Matrix Tissue fluids Tissue Organs
What are the 4 tissue types?
Epithelia
Connective
Nerve
Muscle
What are the features of epithelia tissue?
Covers surfaces Keeps cells connected Separates compartments Forms glands Good adaptive powers Good regenerative powers
Define a desmosome (adhering junction).
Stick cells together and help keep the structure of the epithelia intact.
Define a tight junction (occulting junction).
Seal intercellular spaces and are waterproof so no space for water or other solutes.
Define a gap junction (communication junction).
For cell to cell communication.
Look like tight junctions but have a rosette of proteins called connectents which allows ions to travel through the cell.
Where does the epithelial sit?
On the connective tissue basement membrane.
What does BL and RL stand for?
Basal lamina and reticular lamina.
What is cilia?
Finger like projection from apical surface. Movement of mucas.
Where is the apical surface?
Opposite the basal lamina.
What is the tubulin skeleton arrangement?
9+2 arrangement of tubulin doublets.
What is microvilli?
Increased surface area of cell, are smaller than cilia and thinner. Supported by microfilaments and used for absorption.
What are the 3 types of simple epithelia?
Simple squamous
Simple cuboidal
Simple columnar
What are the 3 types of stratified epithelia?
Stratified squamous
Stratified cuboidal
Stratified columnar
What is the odd type of epithelia?
Pseudostratified
