Tems

... just like the rest of the nucleus, contains DNA. The heterochromatin surrounds the nucleolus. I do not know why the nucleolus appears dark in TEMs. I hope this helps.

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... effector B cell (plasma cell). The name of plasma cell comes from the older days of electron microscopy when people were just using TEMs to look at random samples, and they saw those cells - in addition to the red blood cells - in the samples derived from blood plasma. at the original ...

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