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One of the simplest is the ocellus [plura, ocel/i) of planarians, which provides '
nformation about liglrt intensity and direction but does not form images (Figure
49.16). Sometimes Lilwlilfiigfl - . M l.iQl'll1J T T ' . D. Sensory and Motor
... cells in the body wall to constrict the central gastrovascular cavity. Because
water cannot be compressed very much, decreas'ng the diameter of the cavity
forces the cavity to increase in ength. ln planarians and other flatworms, the
ln planarians and other flatworms, the interstitial fluid is kept under pressure and
functions as the main hydrostatic skeleton. Planarian movement results mainly
from muscles in the body wall exerting localized forces against the hydrostatic ...
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LibraryThing ReviewUser Review - kaionvin - LibraryThing
I wasn't going to review Biology by Neil A. Campbell, because well... 1. It's ubiquitous. 2. I studied from the sixth edition in high school for Biology AP and the eighth edition for first-year ... Read full review
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This is a fabulous book. It also came with access to a free digital copy of the book, which was very handy. Read full review