umbilical cord
The tube that connects the fetus to the placenta.
undescended testicle
A condition in which a testis has not dropped down through the inguinal
canal from the abdomen into the scrotum.
urethra
The tube through which urine passes out of the body; in males, it is also
the tube through which semen is discharged.
urethral opening
The opening in the urethra through which urine is expelled.
urethritis
Inflammation of the urethra.
urophilia (or urolagnia)
A sexual variation in which the person derives sexual excitement from
urine or urination. Such activities are often referred to as "water
sports."
uterine cycle
Another term for menstrual cycle.
uterus
A hollow, thick-walled, muscular organ in the pelvic cavity of a woman; it
is the site at which a fertilized egg implants and the fetus develops during
pregnancy.
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