title: The structure of sperm from the lobster, Homarus americanus.
mesh_terms: D000177:Acrosome / Q000648:ultrastructure; D000818:Animals; D002462:Cell Membrane / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure; D007425:Intracellular Membranes / Q000648:ultrastructure; D008297:Male; D008870:Microtubules / Q000648:ultrastructure; D008121:Nephropidae / Q000033:anatomy & histology*; D009685:Nuclear Envelope / Q000648:ultrastructure; D010503:Periodic Acid-Schiff Reaction; D013094:Spermatozoa / Q000032:analysis / Q000648:ultrastructure