Parenchymula

parenchymula

[‚par·əŋ′kim·yə·lə]
(invertebrate zoology)
The flagellate larva of calcinean sponges in which there is a cavity filled with gelatinous connective tissue.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Parenchymula

 

one of the free-swimming larval stages of sponges and numerous coelenterates. The elongated oval body consists of flagellate ectodermal cells and a mass of entodermal cells (parenchyma). In sponges, the parenchymula settles to the bottom and becomes attached; in coelenterates, it changes into the planula stage.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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The objectives of this study were to measure transport and metabolism of an amino acid and a fatty acid from seawater, to determine the rates of oxygen consumption, and to follow the distribution of a [sup.3.H] label within the larval body fusing light-microscopic autoradiography) in field-collected parenchymula larvae of the demosponge Tedania ignis.
Field-collected parenchymula larvae of Tedania ignis are orange-red in coloration and averaged 818.5 [plus or minus] 17.5 [Mu]m in length and 576.3 [plus or minus] [Mu]m in width (both mean [plus or minus] standard error (SE); n = 16 larvae).
The average weight of a Tedania parenchymula larva was 16.99 [plus or minus] 0.72 [Mu]g/larva (mean [plus or minus] 1 SE, n = 14 groups of larvae @ [is less than] 7 larvae/group).
Although parenchymula larvae of Tedania ignis lack a functional digestive system, these larvae have the physiological capacity to acquire nutrients and energy from their environment through the transport of DOM from seawater.
Transport and metabolism of alanine and palmitic acid by field-collected larvae of Tedania ignis (Porifera, Demospongiae): estimated conseqeunces of limited label translocation

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