
Cortex and medullla
Some organs are formed of two concentric layers: an outer cortex and an inner medulla. The adrenal gland (shown here), the kidney and lymph nodes are all examples of organs that are subdivided into a cortex and a medulla. 10x

Cortex
Some organs are formed of two concentric layers: an outer cortex and an inner medulla. The adrenal gland (shown here), the kidney and lymph nodes are all examples of organs that are subdivided into a cortex and a medulla. 10x

Medulla
Some organs are formed of two concentric layers: an outer cortex and an inner medulla. The adrenal gland (shown here), the kidney and lymph nodes are all examples of organs that are subdivided into a cortex and a medulla. 10x

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