Instead of something completely new, with all the inherent delays associated with testing and the high risk of failure, it was suggested in some circles that it might be possible to re-engine an existing type and beef up its bogies and suspension.
Head on a swivel, opposition like a block away
Previous studies had shown that the degree of protection to microaggregates on OC was higher than that of the macroaggregates, since the mean residence time (MRT) of OC in macroaggregates is less than in microaggregates [43 ,44 ,45 ]. von Lützow et al.
Lacking body cavities and both circulatory and excretory organs, with subepidermal nerve plexuses and 'brains' represented, if at all, by thickened anterior commissures, and with simple reproductive set-ups, acoels come close to representing a model stem ancestor for bilaterians.
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