Search results
Results from the WOW.Com Content Network
[citation needed] Most shark species have five gill slits on each side, however, some species can have up to six or seven like the sixgill sawshark and sharks in the order Hexanchiformes. [40] As part of their respiratory system, sharks also have an accessory respiratory opening called a spiracle behind their eyes. Spiracles are cartilaginous ...
The spiracle is often located towards the top of the animal allowing breathing even while the animal is mostly buried under sediments. [5] As sharks adapted a faster moving lifestyle some became obligate ram ventilators , breathing exclusively by forcing water through their gills by swimming; among these are requiem sharks and hammerhead sharks ...
The Pacific spiny dogfish has a unique system of ventilation. This type of dogfish has five gills on each side of their heads, but do not have gill covers like bony fish. The shark is able to breathe with these gills by swimming or staying in a current. The Pacific spiny dogfish also has a special feature called a spiracle.
The average shark bite can generate up to 40,000 pounds of pressure per square inch; however, your odds of getting attacked and killed by a shark are only 1 in almost 3.5 million.
The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.
Sponges lack specialised respiratory structures, and the whole of the animal acts as a gill as water is drawn through its spongy structure. [13] Aquatic arthropods usually have gills which are in most cases modified appendages. In some crustaceans these are exposed directly to the water, while in others, they are protected inside a gill chamber ...
The respiratory system is the set of organs responsible for the intake of oxygen and the expelling of carbon dioxide. As dogs have few sweat glands in their skin, the respiratory system also plays an important role in body thermoregulation. [10] Dogs are mammals with two large lungs that are further divided into lobes.
Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.