Why do some organs lack the ability to heal?

Human Anatomy, Physiology, and Medicine. Anything human!

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opuntia
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Post by opuntia » Thu Jul 28, 2005 12:21 pm

I'll try the same procedure :wink:
Something tells me that this is going out of topic!
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Dr.Stein
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Post by Dr.Stein » Thu Jul 28, 2005 1:23 pm

AWAWAWWAWAWAA please forgive Dr. Chitchat Stein :roll: :D

So, back on topic, ... err ... oh I have no idea what I must say... :?

Next please...
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opuntia
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Post by opuntia » Thu Jul 28, 2005 6:30 pm

Don't worry i'm sure that we all like your chitchatter :D
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victor
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Post by victor » Fri Jul 29, 2005 11:35 am

Can some of you explain about ordinary cell, far-developed cell and full-developed cell?? They aren't written in m textbook..oh yes, talking about nerve, I ever read 'actually nucleus word in the nerve cell is onl for symbolizing something inside the nissl body' is that true?
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Dr.Stein
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Post by Dr.Stein » Fri Jul 29, 2005 1:08 pm

You know that the origin of all body cells are mesenchyme (stem cells). This will differentiate to become another cell types. The simple cell type for instance epithelial cells; this type is highly proliferative. More complicated one for example chondrocytes. They also proliferative and can differentiate to become osteocytes. Here you see, osteocytes are far-developed, their proliferation capacity is decreasing. Full-developed cell for instance RBCs and neurons as I told you before.

There is a nice article about stem cells in National Geographic July. Have you get it? ;)

About nucleus vs. Nissl Body... As a cell, neuron has its real nucleus to coordinate its function, that's vital. Nissl Body or Nissl substance, are really just large clumps of rough ER that are clearly visible with a light microscope. Their presence indicates that neurons are major league protein factories. This is common for cells which are secretory cells.
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