title: The ultrastructure of the thecal cell of the teleost, Oryzias latipes, during ovulation in vitro.
abstract: Ultrastructural examination of the follicular envelope of the teleost, Oryzias latipes, during ovulation in vitro showed that the follicle cell layer became increasingly dissociated. Microfilaments, measuring 50-70 A, were sparse in the thecal cells at the start of incubation, but were organized into bands after 5 hr, and into bundles after 10 hr of incubation. It is suggested that these microfilaments are contractile and are involved in cell movement during ovulation.
mesh_terms: D000818:Animals; D002465:Cell Movement; D005260:Female; D005399:Fishes / Q000033:anatomy & histology* / Q000502:physiology; D006854:Hydrocortisone / Q000494:pharmacology; D066298:In Vitro Techniques; D009940:Organoids / Q000648:ultrastructure; D006080:Ovarian Follicle / Q000648:ultrastructure*; D010060:Ovulation / Q000187:drug effects; D013799:Theca Cells / Q000502:physiology / Q000648:ultrastructure*
chemical_list: D006854:Hydrocortisone