Biology Reference
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Fig. 5.13 Spermatid centrosomes TEM: The spermatid has two functional centrioles (left), while
mature sperm (right) have only one centriole, the proximal centriole (PC) (centrosomal
reduction). The distal is a vestige. Note centriolar adjunct (CA) on the right with microtubules
x85,000 (
www.sathembryoart.com
)
Fig. 5.14 Disorganized distal centriole in midpiece and tail axonemes in transverse sections. The
centriole has disorganized microtubules (MTs) surrounded by nine dense fibers and mitochondria.
Note MT doublet within midpiece showing axoneme, dense fibers, and mitochondria (left). Tails
show the fibrous sheaths as well and the 9 ? 2 organization of MTs (a-d) x87,500, x70,000
