Question

Cortex and medulla are the two regions of ________(thyroid/adrenal).

Answer 1

Hint: Kidney are the two reddish brown bean shaped structures that are found in the vertebrates. These are mostly responsible for filtering the blood and also used in the removal of wastes. Here, we are going to find the gland which includes two regions namely cortex and medulla. Through some of the information, it could be found and analyzed.

Complete answer:
  The kidney helps to filter the blood. These also maintain the body’s fluid balance. It also expels the metabolic wastes. Generally, a human's kidney is ten centimeters long. They are present behind the peritoneum and beneath the diaphragm. The following are some of the characteristics and their diagram that comes under the kidney. They are as follows:

SYSTEM	Urinary system-endocrine system
ARTERY	Renal artery
VEIN	Renal vein
NERVE	Renal plexus

Kidneys come under the adrenal gland. As we already know, the kidney has two regions namely cortex and medulla. These are the internal layers of the kidney. These are mainly composed of the subunits which are known as nephrons. Nephrons are the tubules which are located in the medulla and they receive the blood vessels in the renal cortex. The cortex is the outermost layer that is covered by the connective tissues. This is made up of the granular tissues. Medulla is the middle layer of the kidney. This consists of many pyramidal tissues that are called renal pyramids. Kidney is the one which comes under the adrenal gland. So, the correct answer is adrenal gland.

Note:
     Cortex and medulla help in the regulation of the cortisol and aldosterone levels. These are referred to as the stress hormone. Cortex helps in the secretion of the male hormones known as androgens and also in the secretion of the female hormones known as estrogens. Medulla can control the autonomic reflexes. These are very much helpful in the development and maintenance of body growth.