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Artificial gills are hypothetical devices to allow a human to be able to take in oxygen from surrounding water. This is speculative technology that has not yet been demonstrated. Natural gills work because most animals with gills are thermoconformers (cold-blooded), so they need much less oxygen than a thermoregulator (warm
The birds of paradise are thought to have originated 24–30 million years ago and belong to the radiation of passerines that occurred in Australia during the last 60 million years. [ 8 ] [ 9 ] [ 10 ] As Australia become more arid over the last several million years, the birds of paradise withdrew to the regional rainforests of New Guinea and ...
The gill arches of bony fish typically have no septum, so the gills alone project from the arch, supported by individual gill rays. Some species retain gill rakers. Though all but the most primitive bony fish lack spiracles, the pseudobranch associated with them often remains, being located at the base of the operculum.
The paradise riflebird is a medium-sized bird, with males averaging about 30 cm (11.8 in) in height and weighing on average 134 to 155 g (4.7 to 5.5 oz). Females are slightly smaller, averaging at 29 cm (11.4 in) and weighing on average 86 to 112 g (3.0 to 3.9 oz).
In some nudibranchs, the mantle cavity and the original gill have disappeared altogether. Instead, the upper surface of the body has numerous club-shaped or branched projections called cerata that function as secondary gills. Secondary gills are also present in the unrelated genus Patella, in which they are found as folds within the mantle cavity.
It is a striking ornamental plant native to South America, mainly Argentina and Uruguay. [1] It is naturalized in Texas, and fairly common in the rest of the southwestern United States, [1] where it is known as bird of paradise bush, desert bird of paradise, yellow bird of paradise, and barba de chivo.
Gill arches supporting the gills in a pike. Branchial arches or gill arches are a series of paired bony/cartilaginous "loops" behind the throat (pharyngeal cavity) of fish, which support the fish gills. As chordates, all vertebrate embryos develop pharyngeal arches, though the eventual fate of these arches varies between taxa.
Most fish have gills. A fish swims into a net and passes only part way through the mesh. When it struggles to free itself, the twine slips behind the gill cover and prevents escape. [1] Gillnets are so effective that their use is closely monitored and regulated by fisheries management and enforcement agencies.