Rhoptry
(Redirected from Rhoptries)
A rhoptry is a specialized secretory organelle. Rhoptries, as well as micronemes, are characteristic of the motile stages of Apicomplexa protozoans, (specifically merozoites), and are usually located toward the apical end of the organism. These structures can vary in number and shape, and contain numerous enzymes that are released during the penetration process.