Bulbospongiosus muscle

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Description:

This muscle is present in both the male and female

Origin in female:
Perineal body, where the muscle converges with other external perineal muscles

Insertion in female:
Attaches to the corpus cavernosum clitoris anterior to the ischiocavernosus

Actions in female:
Compresses the opening to the vagina

Origin in male:
Perineal body, where the muscle converges with other external layer muscles, and the tendinous median raphe

Insertion in male:
Attach onto the corpus spongiosum and onto the corpus cavernosum anterior to the ischiocavernosus; end in a dorsal aponeurosis that wraps around the dorsal vessels of the penis

Actions in male:
Compresses the urethra within the male penis to help with ejaculation

Nerve supply:
Pudendal nerve

Blood supply:
Branches of the internal iliac artery