histo epithelial cell help

[absolutjag9]

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i just started histo and i need some help on how to differentiate betwee pseudostratified columnar epithelium and simple and stratified columnar epithelium. any help would be appreciated. i cannot find anything online.

 

[turkeyjerky]

Get off SDN and look at slides!

 

[turkeyjerky]

But seriously, you should be able to differentiate simple from the other two very easily--simple has no basal cells. As for pseudo vs stratified, pseudo just looks a lot funnier, whereas true stratified has much more orderly rows of cells. Also pseudo is ciliated whereas stratified never has cilia.

 

[kryptik]

i just started histo and i need some help on how to differentiate betwee pseudostratified columnar epithelium and simple and stratified columnar epithelium. any help would be appreciated. i cannot find anything online.

pseudostratisfied columnar --> pseudo means false or fake so it looks like its stratified columns but in reality its not (fake), in other words every cell makes contact with the basement membrane, they are not stratified or stacked on one another. The "stratification" is an effect of the nucleus of some of the cells being pushed up and some down.

stratisfied columnar --> cells stacked on each other (truely stacked unliked pseudo that appears stacked but isnt), the topmost layer of the stack is columnar cells which is how stratisfied epithelium gets its name eg a stack of cells with the topmost layer squamous will be called stratisfied squamous regardless of the type of cells that make up the rest of the stack

simple columnar --> cell columns arranged neatly next to each other

i hope my explanation makes sense

 

[han14tra]

Stratified columnar is rarely found in the human body. It's unlikely you'll be tested on it because it is so rare. Only found in some glands.

Simple columnar is one layer of nuclei. Usually neatly aligned.

Pseudostratified- if you see any nuclei stacked on top of each other. Don't confuse for transitional epithelium in the urinary system. Watch out for the Pillow cells there.

 

[camo]

go to histo-world.com. this is an amazing site. I took histo as a pre-med this past semester and my freaking teacher used questions off this site for tests. HAHA. I freaking rocked those tests. It's a really good site, nonetheless. ENJOY!

 

[absolutjag9]

thanks everyone for the tips i've been reading ross/pawlina and junquiera

i just found a hiatt/garner atlas too

we just finished week 1-so we start with bone on monday.

do you recommend a way to recall how to differentiate btwn the cartilages---ie fibro, elastic and hyaline?

 

[tco]

Hyaline is by FAR the smoothest looking. After that, I don't really remember. I'm sure that I'll learn again in a few weeks 🙂 Good luck!

 

[camo]

For me hyaline cartilage is the easiest to distinguish between the three. To me HC looks like a bunch of little eyeballs. Hence the chondrocyte trapped in the lacunae. Hyaline cartilage looks smoother than the other two.

Now fibro and elastic cartilage look very similar. The only thing that separates the two is that elastic cartilage is made of elastin which you should be able to distinguish this when viewing the slides. The elastin looks like thin strands of string. Other than that you have to develop a good eye for these two.

However, sometimes fibrocartilage may look similiar to hyaline.

If this helped good, if it confused the crap out of you just skip and ignore.

Good luck

 

[tco]

Oh yeah! Elastin stains very dark, if I remember correctly. Like very dark brown or even black.

So, basically, if you can identify that the slide is cartilage, you should be able to see if it's smooth or not. If it's really smooth, it's hyaline. If it's not smooth, look for the dark string stains. If they're present, it's elastic. If they aren't present, it's fibrous.