title: Sperm-egg association in animals.
mesh_terms: D000177:Acrosome / Q000648:ultrastructure; D000818:Animals; D002453:Cell Cycle; D002459:Cell Fusion; D002462:Cell Membrane / Q000502:physiology; D002467:Cell Nucleus / Q000502:physiology; D002843:Chromatin / Q000378:metabolism; D003593:Cytoplasm / Q000502:physiology; D005260:Female; D005306:Fertilization; D008297:Male; D008322:Mammals; D008871:Microvilli / Q000502:physiology; D010063:Ovum / Q000648:ultrastructure; D013045:Species Specificity; D013081:Sperm Motility; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000648:ultrastructure; D014817:Vitelline Membrane / Q000502:physiology; D015044:Zona Pellucida / Q000502:physiology
chemical_list: D002843:Chromatin