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Ulcer: the disintegration of the surface of the skin resulting in an open sore
Ulcerative colitis: inflammation and ulceration of the colon and rectum
Ulna: the inner bone of the forearm
Ulnar nerve: one of the primary nerves in the arm
Ultrasound: sound waves of extremely high frequency
Umbilical cord: a long flexible tube like structure which connects the foetus to the placenta
Urea: a colourless crystalline substance which exists in blood and tissue fluids and which is produced by protein metabolism and excreted in urine
Ureter: tubes which take urine from the kidney to the bladder
Urethra: the canal through which the urine passes on its way from the bladder to the exterior
Urethritis: inflammation of the urethra
Uridosis: the presence of excessive amount of urea in the sweat
Urinary tract: the vessels which pass urine from the kidney to the urethra via the bladder
Urine: the fluid which is secreted by the kidneys and which is stored in the bladder and excreted through the urethra
Urology: the branch of medicine concerned with the study and treatment of diseases of the urinary tract
Urticaria: a skin rash caused by the sudden release of histamine
Utero: prefix denoting the uterus
Uterus: a hollow, thick-walled, muscular organ lying within the pelvic cavity of the female and which houses the developing foetus.
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