sperm fibrous sheath
A cytoskeletal structure surrounding the axoneme and outer dense fibers of the sperm flagellum. Consists of two longitudinal columns connected by closely arrayed semicircular ribs that assemble from distal to proximal throughout spermiogenesis. The fibrous sheath probably influences the degree of flexibility, plane of flagellar motion, and the shape of the flagellar beat.
GO:0110165
cellular anatomical structure
is_a
GO:0036126
sperm flagellum
part_of
flagellar fibrous sheath
exact
flagellum fibrous sheath
exact