title: Some aspects of fertilization in marine invertebrates.
mesh_terms: D000177:Acrosome / Q000502:physiology; D000818:Animals; D002633:Chemotaxis; D004447:Echinodermata; D005260:Female; D005306:Fertilization; D007448:Invertebrates; D008297:Male; D010063:Ovum / Q000502:physiology* / Q000648:ultrastructure; D011188:Potassium / Q000378:metabolism; D012964:Sodium / Q000378:metabolism; D013081:Sperm Motility; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000502:physiology*
chemical_list: D012964:Sodium; D011188:Potassium