Can someone tell me what I am seeing in center

[narayanan]

This is musambi fruit, a citrus fruit, outer skin slice under a microscope at 1500x. 100x with oil immersion and 15x eyepiece.
[youtube] https://youtu.be/qOs2XiUHYV8[/youtube]
I see transparent cells but what is the circle in center. I can see things moving inside the circle?
Is it some cell organelle or my 100x objective touching the coverslip hard.

[mrsonchus]

Hi, looks like a cell-nucleus to me.
The movement within is very likely Brownian-motion as this is live tissue. most live cells (plant) appear essentially transparent.

Nice clear focus on the nucleus, if that's indeed what it is.

John.

[narayanan]

Thanks for the reply, attached a high contrast photo of the center

[mrsonchus]

Hmm, actually, this may be the nucleolus, found within the nucleus - there appears to be a somewhat flattened nucleus around it? Difficult to tell exactly but that would be my best bet.

[narayanan]

Thanks, well actual cells look like this

[Crater Eddie]

I too vote for Brownian motion.
CE