title: A study of the chorion and the follicle cells in relation to the sperm-egg interaction in the ascidian, Ciona intestinalis.
mesh_terms: D000177:Acrosome / Q000648:ultrastructure; D000818:Animals; D002823:Chorion / Q000648:ultrastructure; D002938:Ciona intestinalis / Q000033:anatomy & histology / Q000502:physiology*; D005260:Female; D005306:Fertilization; D008297:Male; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D010063:Ovum / Q000648:ultrastructure; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000648:ultrastructure; D014561:Urochordata / Q000502:physiology*