The perineal artery is an oxygen-rich blood vessel of the pelvic floor region. It originates from the internal pudendal, which in turn arises from the internal iliac artery. It arises slightly distal to the inferior rectal artery as it usually stretches behind the superficial transversus perineal muscle.
From its point of origin in the pudendal canal, the perineal artery runs medially (inwardly) and anteriorly, giving off several branches, supplying the scrotum, ischiocavernosus, the bulbospongiosus, the transverse perineal muscle, and the posterior wall of septum. All these terminal branches anastomoses with the external pudendal arteries.
Below, diagram of pelvic floor arteries, showing the perineal artery
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