title: Morphology of the site of sperm entry on the frog egg.
mesh_terms: D000818:Animals; D001001:Anura; D002462:Cell Membrane / Q000648:ultrastructure; D003078:Colchicine / Q000494:pharmacology; D005260:Female; D005306:Fertilization; D006982:Hypertonic Solutions; D008297:Male; D008871:Microvilli / Q000648:ultrastructure; D010063:Ovum / Q000187:drug effects / Q000648:ultrastructure*; D011894:Rana pipiens; D013094:Spermatozoa
chemical_list: D006982:Hypertonic Solutions; D003078:Colchicine