Oncosphere ultrastructure

The egg and reproductive system thus present an elegant model for the study of a number of areas of physiological interest, especially the ultrastructure and cytochemistry of the spermatozoa, ova and embryonic envelopes (see p. 166), as well as the physiological processes involved in egg hatching and the subsequent activation of the released oncosphere. 

Early ultrastructural and developmental studies on the oncosphere have been reviewed in detail (442, 888, 889). More recent studies are those on ... 

It is not intended here to describe the ultrastructure of the oncosphere in detail as this is well covered in the above accounts but the following organ systems involved in the process of penetration require further consideration. 

Chew, M. W. K. (1983). Taenia crassiceps ultrastructural observations on the oncosphere and associated structures. Journal of Helminthology, 57 101-13. 

Ultrastructure of the hatched and unhatched oncospheres of Taenia saginata. Folia Parasitologica, 29 45-50. 

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