Crab in action on a sea urchin. Crabs are in the subphylum Crustacea. They are decapods (having ten legs), along with lobsters, crayfish and shrimps. Crabs form an order within the decapods, called the Brachyura. Their short body is covered by a thick exoskeleton.
Plummer's Disease is a condition where there is a single hyperfunctioning nodule producing excess thyroid hormone.Henry Plummer in 1913 described a clinically distinct form of thyrotoxicosis due to solitary or multiple toxic nodules in the thyroid.I restrict the term to a solitary a toxic nodule. This nodule is an adenoma (a benign tumour).enry Plummer in 1913 described a clinically distinct form of thyrotoxicosis due to solitary or multiple toxic nodules in the thyroid. I restrict the term to a solitary a toxic nodule. This nodule is an adenoma (a benign tumour).
Munchausen syndrome, referred to as factitious disorder, is a mental condition in which sufferers cause or pretend to have physical or psychological symptoms in themselves. It is thought to be motivated only by a desire to assume the role of a sick person rather than by financial gain, improving his or her physical condition, avoiding responsibility, drug seeking, or some other benefit, as occurs in malingering.