EPITHELIUM Flashcards
4 MAIN TYPES OF EPITHELIUM
Epithelial Tissue
Connective Tissue
Muscle Tissue
Nervous Tissue
CHARACTERISTICS OF EPITHELIUM
1. Covers body ______ and line _____
surfaces; internal organs
Epithelium cells are tightly together with no space for blood vessels which means?
Avascular
it separates epithelium and connective tissues
basement membrane
Anchors Epithelium to underlying connective tissue
Basement Membrane
Exhibits Polarity
Apical and Basal Surface
structures present in the apical surfaces are different from that of the basal and lateral surfaces for they differ in terms of their functions
Polarity
Thin, Fibrous, non-cellular region of tissue that separates the epithelium from the underlying connective tissue
Basement Membrane
Serves as mechanical barrier
Basement Membrane
a type of cancer that did not pass the basement membrance/mechanical barrier
Carcinoma in situ/ in situ cancer
Number of Layers of epithelium are described with the use of:
Simple, Stratified, and Pseudostratified
consists one layer of cells from the basement membrane
Simple
2 or more lyaers of cells are present from the basement membrane
stratified
Cells become so crowded that some of the nuclei become displaced and several rows of nuclei appear in sections of the cell sheet, even though each cell is still attached to the basement membrane
Pseudostratified
To define the shpae of the cells
squamous, cuboidal, columnar
sqamour are ______
flattened
Cuboidal are _______
cubes
Columnar are ______
columns
Commonly found at sites where there is filtration and diffusion
Simple Squamous Epithelium
Single layer of cells that are no longer than they are wide
Simple Columnar Epithelium
A simple Columnar Epithelium has the functions of?
absorption and secretion
It is a single layer of cube-shaped cells (tall as they are wide)
Simple Cuboidal Epithelium
The functions of a simple cuboidal epithelium
Absorption and Secretion
Many layers of cells with flat cells on the superficial layer; protection against friction
Stratified Squamous Epithelium