Cockroach Anatomy model : Alpha Chem is manufactures,exporter & suppliersĀ Cockroach Anatomy model. Cockroach Anatomy model : A set of two models, one dissectable into two parts, showing the anatomy of cockroach, alimentary canal regions, salivary glands, reproductive organs, nervous system etc. The other model shows the ventral structure with detachable mouth parts, wings and appendages, with key card.