T cell by SEM
This scanning electron micrograph shows a T lymphocyte. T and B cells are indistinguishable by light microscopy, but can be differentiated experimentally by probing their surface receptors.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Robert Bear and David Rintoul, Adaptive Immunity. December 10, 2013."
http://cnx.org/content/m47434/latest/
OpenStax CNX
CC BY 3.0.