× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
g
3
3
2
J
2
p
2
m
2
h
2
s
2
r
2
d
2
l
2
a
2
New Topic  
pianist pianist
wrote...
Posts: 4
Rep: 0 0
7 years ago Edited: 7 years ago, pianist
My task is to classify the following epithelial tissues. I've inserted an attachment to the samples.


This is what i think they are:
A: stratified cuboidal
B: simple squamous
C: simple cuboidal
D: pseudostratified columnar or stratified columnar?
E: simple columnar

Any help would be appreciated!
Post Merge: 7 years ago

Hello,
Looking at the images again, I think sample A might not be stratified cuboidal? I think it might be transitional?
And for D, i think it might be pseudostratified columnar.

A and D is the most tricky for me.What do you guys think?
 Attached file 
(2155.41 KB)
You must login or register to gain access to this attachment.
Read 158 times
2 Replies

Related Topics

Replies
wrote...
Staff Member
7 years ago
Try these searches:

https://biology-forums.com/index.php?action=gallery;sa=search2;searchfor=stratified%20cuboidal

https://biology-forums.com/index.php?action=gallery;sa=search2;searchfor=squamous

https://biology-forums.com/index.php?action=gallery;sa=search2;searchfor=cuboidal

https://biology-forums.com/index.php?action=gallery;sa=search2;searchfor=stratified%20columnar

https://biology-forums.com/index.php?action=gallery;sa=search2;searchfor=simple%20columnar

I'm not a subject expert, but I hope this helps
Ask another question, I may be able to help!
wrote...
7 years ago
Simple Epithelia

Simple epithelium consists of a single layer of cells. They are typically where absorption, secretion  and filtration occur. The thinness of the epithelial barrier facilitates these processes.

Simple epithelial tissues are generally classified by the shape of their cells. The four major classes of simple epithelium are: 1) simple squamous; 2) simple cuboidal; 3) simple columnar; and 4) pseudostratified.

Simple Squamous

Simple squamous epithelium cells are flat in shape and arranged in a single layer. This single layer is thin enough to form a membrane that compounds can move through via passive diffusion. This epithelial type is found in the walls of capillaries, linings of the pericardium, and the linings of the alveoli of the lungs.

Simple Cuboidal

Simple cuboidal epithelium consists of a single layer cells that are as tall as they are wide. The important functions of the simple cuboidal epithelium are secretion and absorption. This epithelial type is found in the small collecting ducts of the kidneys, pancreas, and salivary glands.

Simple Columnar

Simple columnar epithelium is a single row of tall, closely packed cells, aligned in a row. These cells are found in areas with high secretory function (such as the wall of the stomach), or absorptive areas (as in small intestine). They possess cellular extensions (e.g., microvilli in the small intestine, or the cilia found almost exclusively in the female reproductive tract).

Pseudostratified

These are simple columnar epithelial cells whose nuclei appear at different heights, giving the misleading (hence pseudo) impression that the epithelium is stratified when the cells are viewed in cross section.

Pseudostratified epithelium can also possess fine hair-like extensions of their apical (luminal) membrane called cilia. In this case, the epithelium is described as ciliated pseudostratified epithelium. Ciliated epithelium is found in the airways (nose, bronchi), but is also found in the uterus and fallopian tubes of females, where the cilia propel the ovum to the uterus.

Stratified Epithelium

Stratified epithelium differs from simple epithelium by being multilayered. It is therefore found where body linings have to withstand mechanical or chemical insults.

Stratified epithelia are more durable and protection is one their major functions. Since stratified epithelium consists of two or more layers, the basal cells divide and push towards the apex, and in the process flatten the apical cells. 

Stratified epithelia can be columnar, cuboidal, or squamous type.
KYNUNU
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  1054 People Browsing
 111 Signed Up Today
Related Images
  
 476
  
 27
  
 17
Your Opinion
Do you believe in global warming?
Votes: 370