Crucigrama InvertebratesVersión en línea English crossword about invertebrates (science) for bilingual education. por Irene glez 1 fusion of head and thorax 2 part of the body in molluscs used for moving 3 organisms that can't make their own organic matter from inorganic matter. 4 mollusc with tentacles 5 bilateral invertebrate with shell 6 medium part of the body of insects 7 organ in some aquatic organisms used for breathing 3 2 7 5 6 4