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Intestinal systems

A. Schmidt-Rhaesa

in The Evolution of Organ Systems

Published in print:
2007
Published Online:
September 2007
ISBN:
9780198566687
eISBN:
9780191718007
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198566687.003.0012
Subject:
Biology, Evolutionary Biology / Genetics

Animals obtain nutrients using a two-step procedure: food collection and uptake by endocytosis. In eumetazoans, a particular intestinal tract evolved, making it possible to digest food prior to the ... More


Annelida: Myzostomida

Conrad Helm and Christoph Bleidorn

in Structure and Evolution of Invertebrate Nervous Systems

Published in print:
2015
Published Online:
March 2016
ISBN:
9780199682201
eISBN:
9780191813436
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199682201.003.0022
Subject:
Biology, Animal Biology

Myzostomida comprise a taxon of mainly soft-bodied, flattened, oval, and disc-like marine protostomes. They are usually associated with echinoderms. Most myzostomids exhibit five pairs of uniramous ... More


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