the structure and control of the blood vessels of invertrebrates
Thesis (M.A.)--Boston University, 1940 === As a large Metazoa developed, osmosis and streaming of protoplasm had to be replaced by a more efficient maintenance system. A complex arrangement of invaginations would provide sufficient absorptive area, vut no advance is possible with such a system. Circ...
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| Language: | en_US |
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Boston University
2012
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| Online Access: | https://hdl.handle.net/2144/4123 |