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It has a yellowish colour due to the stored lipids, which include cholesterol and various fatty acids.

The adrenal cortex is the more superficial layer. Each hormone is produced by one cell with evidence showing that the two types of cells are found in different areas of the adrenal medulla and that they are independently controlled. From specialized cells epinephrine, also known as adrenaline, and norepinephrine, also known as noradrenaline, are produced. The medulla is responsible for the secretion of two hormones. The medulla is often a grey-pink colour due to the abundance of blood vessels and connective tissues. The adrenal medulla is the deep layer of the adrenal gland. The adrenal gland had two key layers, the adrenal medulla and adrenal cortex. Since it is an endocrine organ it is important that is highly vascularized, this will allow for the secreted hormones to affect the body. The adrenals are also located near the 12 th rib and the diaphragm with major arteries and veins in close proximity as they run along the posterior wall of the abdominopelvic cavity. The adrenal glands are connected to the kidneys via the dense fibrous capsule that firmly holds the two organs together. Since they sit on top of the kidney’s superior border, the adrenals can be referred to as the suprarenal gland. The adrenal gland is a yellow, pyramid-shaped gland that sits on top of each kidney.