What is the structure of the adrenal glands? Any idea? I got nothin! Please & Thank you ?

Question

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Answer 1

The outer covering (adrenal cortex) is derived from the fetal mesodermal ridge, a structure that also gives rise to the kidneys  

Answer 2

"The most obvious aspect of the structure of the adrenal glands is their partitioning into two distinctive components:

the paler medulla (centre), and the darker cortex (surround).

Both of these tissues contain many blood vessels, hence they may be described as "richly vascularized".

Adrenal Medulla

The medulla consists of many large columnar cells called "chromaffin cells".

These synthesize and secrete catecholamines.

There are also some Ganglion cells are also observed.

Blood from throughout the adrenal gland collects into large medullary veins to exit the gland.

Adrenal Cortex

The adrenal cortex consists of three concentric zones of steroid-synthesizing cells: glomerulosa, fasiculata and reticularis. Although the boundaries between these zones are indistinct, each of these zones has a characteristic arrangement of cells."