The term ovum is usually restricted to the single female sex cell, but the term egg, in its common use to indicate a bird's egg, refers to a more complex structure, only part of which is produced in the ovary of the bird. The ovum of such an egg is a cell swollen with yolk material. The rest of the eggâe.g., the jelly mass surrounding amphibian eggs, and the shell, membranes, and egg white, or albumen, of bird eggsâis not cellular and is secreted around the ovum as it passes down the oviduct.
Cushing's disease---also known as Cushing's syndrome---and Addison's disease occur when your adrenal glands do not produce proper amounts of a hormone called cortisol.
These glands make hormones essential to a healthy life. When they don't make enough of these hormones, Addison's disease is the result. Addison's disease is a rare condition. Only one in 100,000 people has it. It can happen at any age to either men or women. People with Addison's disease can lead normal lives as long as they take their medication. President John F. Kennedy had the condition. In Addison's disease, called primary adrenal insufficiency, the adrenal glands don't make enough of a hormone called cortisol, or less often, a related hormone called aldosterone.