Schistosoma mansoni: description of the head gland of cercariae and schistosomules at the ultrastructural level.
D000818:Animals; D003594:Cytoplasmic Granules / Q000378:metabolism / Q000648:ultrastructure; D006651:Histocytochemistry; D012550:Schistosoma mansoni / Q000378:metabolism / Q000648:ultrastructure*