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| Ulcer |
an open sore that occurs on the skin or on a mucous membrane because of the destruction of surface tissue |
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| Ulcerative colitis |
a chronic condition in which ulcers occur on the mucous membrane lining of the colon (the end of the large intestine) and the rectum |
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| Ultrasound scanning |
an imaging procedure used to examine internal organs in which high-frequency sound waves are passed into the body, reflected back, and used to build an image; also sometimes called sonography |
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| Ultraviolet light |
a form of invisible light in sunlight that is responsible for the tanning and burning of skin and can cause cataracts and skin cancer |
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| Umbilical cord |
the tubal structure (consisting of two arteries and one vein) that connects the foetus to the placenta, supplying the foetus with oxygen and nutrients and removing some waste products |
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| Umbilical hernia |
a condition present at birth in which a part of the baby's intestines bulge through a weak area of the abdominal wall, creating a swelling around the navel |
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| Unconsciousness |
a temporary or prolonged loss of awareness of self and of surroundings |
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| Undescended testicle |
a testicle that has not moved down from the abdomen, where it develops, into the scrotum |
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| Unsaturated fat |
a fat or oil found mainly in vegetables; thought to reduce the risk of coronary heart disease |
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| Uraemia |
abnormally high levels of waste products such as urea in the blood |
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| Urea |
a waste product of the metabolism of proteins that is formed by the liver and secreted by the kidneys |
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| Ureters |
two tubes that carry urine from the kidneys to the bladder |
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| Urethra |
the tube by which urine is released from the bladder |
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| Urethritis |
inflammation of the urethra |
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| Urethrocele |
a bulging of the urethra into the vagina |
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| Urethrocystitis |
inflammation of the urethra and the bladder |
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| Urinalysis |
a group of physical and chemical tests done on a sample of urine to check for various disorders, including those of the kidneys and urinary tract |
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| Urinary diversion |
an operation to allow urine passage when the bladder or urethra has become blocked or been removed |
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| Urinary incontinence |
the involuntary release of urine because of the inability to control bladder muscles; may occur as a natural part of the ageing process or be caused by an injury or disorder |
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| Urinary tract |
the structures in the body that are responsible for the production and release of urine, including the kidneys, ureters, bladder, and urethra |
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