The internal pudendal artery is a major blood vessel that supplies blood to the pelvic region, particularly the external genitalia and perineum. It branches off from the internal iliac artery and travels through the greater sciatic foramen before entering the perineum through the lesser sciatic foramen. This artery is crucial for the vascularization of structures such as the clitoris in females and the penis in males. It also provides blood to the urethra and the surrounding muscles, playing a vital role in sexual function and urinary health.