jl' ~ 



GC 



Ac V 



Figs. 2 and 3. Corresponding areas of two differentiating numan 

 spermatids. In eaeh, the acrosomal vesicle (Ac V) is closely adherent 

 to the nucleus (N) and its content is slightly more dense than the 

 surrounding cytoplasm. The acrosomal granule (Ac Gr), enclosed within 

 in the vesicle, is somewhat flattened and occupies a shallow depression 

 in the nucleus. There are several sizeable vacuoles and numerous 

 smaller ones in the neighbouring Golgi complex (Go C). These are 

 Jbelieved to coalesce with the acrosomal vesicle and so contribute to its 

 progressive enlargement. 



