The posterior scrotal artery is a group of blood vessels found near the external genitalia of the male human body. These blood vessels are one group of extensions that originate from the internal pudendal artery. The posterior scrotal arteries in conjunction with the pudendal artery are responsible for directing blood flow to the penis, testicles, scrotum, and other parts of the male genitalia. A smaller internal pudendal artery can be found in females, and its branches, including the posterior scrotal arteries, also exist to supply the female genitalia. The female counterpart is known as the posterior labial artery. The posterior scrotal blood vessels arise from the perineal branch of the internal pudendal artery. The posterior scrotal artery delivers blood flow to the scrotum. It is accompanied by corresponding veins and nerves known as the posterior scrotal veins and posterior scrotal nerves. Unlike the arteries, the posterior scrotal veins direct blood flow away from the scrotum to the heart. The posterior scrotal artery separates from the perineal artery near the perineal membrane. The artery marks the end of the perineal artery's path.