Epithelial Tissues

Question 1

What is epithelial tissue?

Answer 1

It is what covers and protects the surface of both the inside and outside of the body

Question 2

What are the characteristics of the epithelial tissue

Answer 2

• Is Avascular/ Nonvascular means that there is a lack of blood flow to the epithelial tissue
• Lack of extracellular matrix which surrounds most cells has specialized cell contacts which connect adjacent cells
• have 3 layers have a lateral surface ( between cells) Basement membrane and the apical side Are polar basal side bottom facing basal membrane apical side up
• Regeneration
  able to replace old tissue.

Question 3

What are the functions of the epithelial cell

Answer 3

1. Protection against abrasion and desiccation
2. Barrier
   prevents substances such as water from leaving the cell
3. Absorbing
   epithelial cells have carrier protiens for absorption
4. Secretion
   concerning the mucous, sweat and enzyme secreting portions of the pancreas

Question 4

What are the 2 ways we can classify epithelial cells

Answer 4

We classify epithelial cells according to the number of layers of cells there are and the shape of the cell

Question 5

There are names and descriptions for the structure concerning the number of layers

Answer 5

Simple - one layer
Stratified - more than one layer
Pseudostratified - looks like more than one layer but is just one layer
Transitional - has more than one like stratified in different shapes such as Cuboidal Columnar and when stretched squamous

Question 6

What are the names and descriptions of different shapes of the epithelial cell

Answer 6

Squamous -flat
Cuboidal - in a cuboid shape
Columnar- in a tall rectuangular shape

Question 7

What are the different types of Simple epithelial cells

Answer 7

Simple Squamous
Simple Cuboidal
Simple Columnar

Question 8

What is a simple squamous cell and what is its function

Answer 8

has one layer of cell and has flat cells

function: to allow diffusion filtrartion and some secretion

Question 9

What is a simple cuboidal cell and what is its function/

Answer 9

One layer thick of cuboid looking cells

function: in the kidneys and allows for absorption and secretion.

Question 10

What is the simple columnar epithelial cell and its functiom

Answer 10

Is one layer thick and has tall column looking cells

function: movement of particles especially in the bronchioles

Question 11

What are the different types of stratified cells?

Answer 11

Stratified Squamous
Stratified Columnar
Stratified Cuboidal

Question 12

What is the stratified squamous and what is the function?

Answer 12

Has more than 1 layer amd has flat cells

Function: protection against abrasion and barrier against infection

Question 13

What is the stratified cuboidal epithelial cell and what is the function?

Answer 13

Has more than 1 layer and cells are in a cuboid shape

function: Secretion absorption protection against infection

Question 14

What is the stratified columnar epithelial cell and what is the function?

Answer 14

Has more than one layer and cells are in a tall column shape
function: Protection and secretion

Question 15

What is the pseudostratified columnar cell and what is the function?

Answer 15

One layer of tall column-shaped cells

function: synthesizes and secretes mucus on the upper free surface found on trachea bronchi lining of nasal cavity etc.

Question 16

What is the transitional epithelium and what is its function

Answer 16

has more than one layer of the cell, it has different shapes example when stretched the cells appear squamous when not stretched they appear cuboidal or columnar

function: protect against caustic effects of urine and accommodates the fluctuations of fluid in organs