Anatomy Mesentry, neurovascular bundle c1ceacb4 Pudendal nerve root value: A L5 S1 roots B S1 S2 roots C L2 L3 roots D S2 S3S4 roots High-Yield Explanation Pudendal nerve arises from the sacral plexus in the pelvis( S2- S4). Pudendal nerve is nerve of perineum. External urethral sphincter supplied by pudendal nerve.