This 3D model represents the reproductive system of the Indian cattle leech (Hirudinaria granulosa), a hermaphroditic annelid belonging to Class Hirudinea. Each individual possesses both male and female reproductive organs, but reproduction usually occurs through cross-fertilization between two leeches. The male reproductive system includes multiple pairs of testes, vas deferens, seminal vesicles, and a male genital pore for sperm transfer. The female reproductive system consists of ovaries, oviducts, and a female genital pore. After fertilization, the leech secretes a cocoon from the clitellum, where the eggs develop outside the body until hatching. This model is useful for studying annelid reproduction, hermaphroditism, and invertebrate anatomy.