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Spiracles (/ ˈ s p ɪr ə k əl, ˈ s p aɪ-/ [1] [2]) are openings on the surface of some animals, which usually lead to respiratory systems. Spiracle of a shark (bighead spurdog, Squalus bucephalus) The spiracle is a small hole behind each eye that opens to the mouth in some fish.
Shark Anatomy (50693674756) The gill slits of a whale shark flaring as it expels water from its pharyngeal cavity. In the shark anatomy image, it depicts the beginning half of the shark, including the gills. The shark gills are especially important and were evolved from the chordate pharyngeal gill slits synapomorphy.
For this reason, many sharks and related fish feed very infrequently. The food passes into the comparatively short colon of the shark almost fully digested, and then out the cloaca and vent. A consequence of the spiral valve constricting the lumen of the ileum is that sharks cannot pass large hard objects (such as bones) through their lower ...
Spiracles are reduced or missing in active pelagic sharks. [1] While the shark is moving, water passes through the mouth and over the gills in a process known as "ram ventilation". [ 2 ] While at rest, most sharks pump water over their gills to ensure a constant supply of oxygenated water.
Shark Tale: Motion Picture Soundtrack was released on September 21, 2004. The soundtrack features newly recorded music by various artists, including Christina Aguilera , Mary J. Blige , India.Arie , Bobby Valentino , Sean Paul , Timbaland , The Pussycat Dolls , Ludacris , Missy Elliott , and Justin Timberlake , as well as "Some of My Best ...
The snout is slender and pointed and the wide mouth, often covered with a fleshy nasal flap, is on the underside of the head. The eyes and well-developed spiracles are located on the top of the head. In most species, the spiracles are large and are the main means of drawing water in for respiration.
"The classic fairy tale was appropriated to serve the purpose of socializing children," writes Tatar, and "the Grimms seem to have favored violence over whimsy." Violence, in the right context, was considered funny to young readers, while explicit references to sex were perceived as superfluous to the story, providing neither moral guidance nor ...
Batoid gill slits lie under the pectoral fins on the underside, whereas a shark's are on the sides of the head. Most batoids have a flat, disk-like body, with the exception of the guitarfishes and sawfishes, while most sharks have a spindle-shaped body. Many species of batoid have developed their pectoral fins into broad flat wing-like appendages.