Sperm-canals uniting the vasa efferentia and the ejaculatory duct.
Alternative form for vasa deferentia : vas deferens.
copulatory_complex_leptopla.jpg
copulatory_complex_planocer.jpg
copulatory_complex_triclad2.jpg
copulatory_complex_triclads.jpg
internal_structure_polyclad.jpg
internal_structure_triclads.jpg
pharynx_leptoplana_tremella.jpg