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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 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.
Birds, too, may symbolise human attributes such as stupidity or talkativeness. People have been called "birdbrain[ed]" or "cuckoo", among many other animal epithets. [70] Birds feature prominently in often derogatory similes like "noisy as a goose" and metaphors including "to parrot". [71]
Other predators of hagfish are varieties of birds or mammals. [16] Free-swimming hagfish also slime when agitated, and later clear the mucus using the same travelling-knot behavior. [17] [18] The reported gill-clogging effect suggests that the travelling-knot behavior is useful or even necessary to restore the hagfish's own gill function after ...
This is a list of the bird species recorded in Mexico. The avifauna of Mexico included a total of 1136 species as of April 2024, according to Bird Checklists of the World . [ 1 ] Of the 1135 species, 113 are rare or accidental , 10 have been introduced by humans, 112 are endemic , and five more breed only in Mexico though their non-breeding ...
This includes people from Mexico, Puerto Rico, Cuba, Central and South America and Brazil, but excludes people from Spain. The census uses two separate questions : one for Hispanic or Latino ...
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External gills are the gills of an animal, most typically an amphibian, that are exposed to the environment, rather than set inside the pharynx and covered by gill slits, as they are in most fishes. Instead, the respiratory organs are set on a frill of stalks protruding from the sides of an animal's head. The axolotl has three pairs of external ...