In late spermatids the proximal centriole is about 0.7 [micro]m long (Fig.
latistrigata include (1) the relatively small nucleus (about 10% of head length), (2) large acrosome (which constitutes 90% of the head length), (3) elongate proximal centriole, (4) greater number of mitochondria that are modified, (5) electron-dense material associated with the plasma membrane of the flagellar canal, and (6) swollen terminus of the tail.
Since the distal centriole gave rise to the sperm axoneme during spermiogenesis, it is logical to suppose that the proximal centriole
that is inherited by the embryo could cause aberrant mitosis as both are derived from the same mother centriole in spermatids.
argo the proximal centriole is located extraordinarily far away from the distal one.
Embedded in this material, the proximal centriole is located extraordinarily far away from the distal one (Figs.
The proximal centriole remains associated with the dense fibers of the flagellum and the distal forms the axoneme.
The centrosome specially the proximal centriole is considered to be the kinetic centre of sperm motility.
During spermiogenesis the proximal centriole fuses laterally and orthogonally to the distal centriole to form the basal body, which produces an acentric flagellum (Fig.
The proximal centriole is fused laterally to the distal centriole, creating an acentric basal body (Figs.
The proximal centriole lies perpendicular to the apex of the distal centriole and becomes attached by fibrogranular material to a posterior invagination of the nucleus, termed the nuclear fossa [ILLUSTRATION FOR FIGURES 5, 7 OMITTED].
The proximal centriole is oriented perpendicular to the distal centriole, from which emanates the axial flagellum.
Surprisingly, two similar flagella were generated from distal and proximal centrioles
oriented at a right angle to each other (Konishi et al.