Adrenal Cortex
Adrenal Cortex is the gland that does not originate from embryonic Endoderm. It is derived from the mesoderm, specifically the mesodermal cells of the coelomic epithelium. The adrenal cortex is part of the adrenal glands, which are located on top of the kidneys.

Origin of Adrenal Cortex:
- The adrenal cortex develops from the mesoderm during embryonic development.
- Mesoderm is one of the three primary germ layers that give rise to various tissues and organs in the body.

Formation of Adrenal Cortex:
- The adrenal cortex is formed by the proliferation and differentiation of mesodermal cells in the coelomic epithelium.
- These cells undergo a series of complex processes to differentiate into the different cell types found in the adrenal cortex.

Function of Adrenal Cortex:
- The adrenal cortex is responsible for producing hormones such as cortisol, aldosterone, and androgens.
- These hormones play crucial roles in regulating metabolism, electrolyte balance, and the body's response to stress.

Importance of Knowing the Origin:
- Understanding the origin of the adrenal cortex helps in studying its development, function, and related disorders.
- It also highlights the complex nature of embryonic development and the diverse origins of different glands and tissues in the body.
In conclusion, the adrenal cortex is derived from mesoderm, not from embryonic Endoderm like other glands such as the thymus, parathyroid, and thyroid. This distinction is important in understanding the development and function of the adrenal cortex.