On presence of neurotransmitters in cercariae of trematodes
The analysis of the arrangement of the components of the serotoninergic system (nerve cells) in 16 species of trematode cercariae from 11 families was conducted. The results show generally similar overall layout of serotoninergic nerve cells in different species of cercariae was. The differences relate to such items as number, location and size of the identified serotoninergic cells found in different species of cercariae.