Search results
Results from the WOW.Com Content Network
Spiracle of a bluespotted ribbontail ray, Taeniura lymma. 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.
The angel shark has unique features that differentiates them from other sharks. They are considered as smaller sized sharks because they grow up to only 7 feet (2.1 m) and can weigh around 77 pounds (35 kg), as opposed to the whale shark that can measure up to 32 feet (9.8 m) and weigh 20,000 pounds (9,100 kg).
Spiracles are reduced or missing in active pelagic sharks. [28] While the shark is moving, water passes through the mouth and over the gills in a process known as "ram ventilation". While at rest, most sharks pump water over their gills to ensure a constant supply of oxygenated water.
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.
The school shark is a small, shallow-bodied shark with an elongated snout. The large mouth is crescent-shaped and the teeth are of a similar size and shape in both jaws. They are triangular-shaped, small, and flat, set at an oblique angle facing backwards, serrated and with a notch. The spiracles are small.
However, one study found that the odds of developing dementia fall in people who continue to learn. “Education at any age may protect against cognitive decline,” Dr. Porter says. Manage your ...
President-elect Donald Trump on Wednesday shone a spotlight on the debt ceiling, rejecting a bipartisan government funding deal negotiated by House Speaker Mike Johnson and demanding lawmakers ...
Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements.