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.
It's sometimes referred to as primary adrenal insufficiency. If you have Addison's disease, your adrenal glands don't make enough hormones. Unlike adrenal fatigue, this is an illness that doctors can test and recognize. In most cases of this disease, the adrenal glands have been damaged by the immune system.Other causes of Addison's disease include: 1  Tuberculosis (TB).2  Cancer, such as lymphoma.3  AIDS.nlike adrenal fatigue, this is an illness that doctors can test and recognize. In most cases of this disease, the adrenal glands have been damaged by the immune system. Other causes of Addison's disease include: 1  Tuberculosis (TB).