perineum

väliliha puhekieltä The region between the anus and the vagina in women and between the scrotum and anus in men.
1827, Guys Hospital: Case of Fistula in Perineo, Successfully Treated, The Lancet'', Volume 12, http://books.google.com.au/books?id=5RpAAAAAcAAJ&pg=PA61&dq=%22perineum%22%7C%22perinea%22&hl=en&sa=X&ei=OkvdUdnRCLCfiAetw4HwDQ&redir_esc=yv=onepage&q=%22perineum%22%7C%22perinea%22&f=false page 61,

He was attacked with complete retention of urine, after a debauch, and six weeks afterwards an abscess formed in the perineum, which eventually burst, leaving a fistulous opening, through which the urine continued to be discharged to the period of his admission into the Hospital.

The prostate is surrounded by venous plexi and the perineum has a rich blood supply.

The perineum is diamond shaped and stretches from the pubic symphysis to the coccyx.