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Function of spiracles for sharks
Insects breath through holes on their body called spiracles.
spiracles
According to : www.wikipedia.org/wiki/spiracles"Spiracles are small openings on the surface of some animals that usually lead to respiratory systems."In fish, such as sharks & rays these openings are used to allow the animal to 'rest'. They pump air across the gills when the animal is still.
Millipedes breathe through small holes called spiracles. Spiracles function similar to the gills of a fish and never close completely. These holes are found in pairs along the millipedes body.
No. The aquatic kind of spiracle (such as you'd find on rays and skates) could be located only on cartilaginous fish, or the most primitive of the bony fish. The loosest definition of spiracles seems to include a respiratory opening such as the blowhole in whales; lobsters do have ventral openings to the gills but these are anatomically dissimilar to those. (Also since lobsters are aquatic, they do not possess spiracles of the type you'd find on insects.)
dog
it have spiracles so it can breathe. like a boss
spiracles are the breathing apparatus of insects.
the chrysalis is not airtight (think of it as an extremely fine net) and the pupa does not breath through lungs but through spiracles (insects, some fish and some spiders breathe through holes that are in different sizes in different places on each insect, spider and fish the spiracles lead oxygen into the trachea and tissues)
dog fish eat small crabs and lobsters
The insect uses its spiracles to breathe through instead of their mouth.