polar ring of apical complex
anterior polar ring of apical complex
exact
upper polar ring of apical complex
exact
An electron dense ring at the most anterior position of the apical complex, from which the conoid fibers originate; formed during an invasive life cycle stage of an apicomplexan parasite.
GO:0110165
cellular anatomical structure
is_a
GO:0020007
apical complex
part_of