gastrovascular


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gastrovascular

(găs′trō-văs′kyə-lər)
adj.
Having both a digestive and a circulatory function, as the guts of flatworms and cnidarians.
References in periodicals archive ?
Histological sections of the polyps at the pharyngeal level exhibited eight mesenteries radiating from the inner polyp body wall across the gastrovascular cavity.
For group-2, the identifiable structures were: epidermis and rhabdites, layer of longitudinal muscular fibers, lumen of pharynx, pharynx cavity, gastrovascular cavity, parenchyma and bowel lumen--see Figure 4.
When gastrovascular connections formed between the two sibling explants, usually accompanied by visible exchange of fluid and particles between the explants, and persisted for at least seven months after initial contact, we scored the interaction as compatibility.
At 12 h (4 h after the initiation of the light cycle) and at 18 h (10 h after the initiation of the light cycle), the gastrovascular lumen of two stolons per colony was imaged approximately 1 mm from the stolon tip.
Second, it is possible that flow stimulates photosynthesis until the speed is sufficient to compress the coral tissue and impede both transport of metabolites through gastrovascular canals (Gladfelter, 1983) and exchange with seawater through a reduction in exposed tissue area.
At this stage, the blastopore was closed and there was no coelenteron (= gastrovascular cavity) observed in histological examination (Fig.
In colonial cnidarians and ascidians, common coelomic cavities or gastrovascular circulatory systems enable the transfer of resources between colony regions (Carle and Ruppert, 1983; Gladfelter, 1983; Mackie, 1986; Gateno et al.
In contrast, tentacles form at the bell margin and gonads are protected within the bell in Pelagiidae and Ulmaridae, and gastrovascular canals are absent from Pelagiidae (Kramp, 1961: p.
Studies of the functional biology of cnidarian gastrovascular systems typically implicate both cilia and muscular contractions.
The neural layer ran from the base of the photoreceptors to the gastrovascular cavity (Fig.
Ink acts only as a feeding deterrent through aversion: it causes tentacle retraction or shriveling and gastrovascular eversion.
Despite the cnidarian potential for cell renewal and exchange through gastrovascular connections between polyps, as demonstrated for hydrozoans (Crowell, 1953, Martinez, 1998, Muller et al.