Abstract
This paper contributes to our understanding of participation in the Eucharist by examining the swallow. The paper begins with a thick description of the swallow as act, as phenomenon, and as symbol. This description reveals the swallow’s interstitial nature, which is then examined for its implications on the meaning of participation in the sacrament. The paper then recommends approaches to the Eucharist for Catholics for whom swallowing is difficult or impossible. The paper finally incorporates these findings with the ex opere operato doctrine, demonstrating participation as efficacious interaction. National Catholic Bioethics Quarterly 13.2 (Summer 2013): 253–262.