
Cortex and medullla
Some organs are organized with an outer cortical region and more centrally located medullary region. In this image of a lymph node, the darker staining of the cortex and paler staining of the medulla reflect differences in their components and functions. 10x

Cortex
Some organs are organized with an outer cortical region and more centrally located medullary region. In this image of a lymph node, the darker staining of the cortex and paler staining of the medulla reflect differences in their components and functions. 10x

Medulla
Some organs are organized with an outer cortical region and more centrally located medullary region. In this image of a lymph node, the darker staining of the cortex and paler staining of the medulla reflect differences in their components and functions. 10x

Image source >
This image was taken from a slide in the University of Michigan slide collection.