6/3/2023 0 Comments Planet of the sharks 3d![]() I am trying to get samples of sixgill and sevengill sharks to see how their gill surface area compares to sharks with only 5 arches. No one really knows for sure why most sharks have 5 gill arches and a few species have more than 5. Water flows over the filaments and past the lamellae, where oxygen from the water is diffused into the bloodstream of the animal. ![]() Lamellae are the site of gas exchange and are vascularized (have blood vessels). Each shark has hundreds of filaments and each filament has hundreds of lamellae. ![]() Most sharks have 5 gill arches, with 9 sets (called hemibranchs) of gill filaments. “In all fishes, gills are the primary site of oxygen uptake. candidate working on shark gills at Simon Fraser University, to explain more about shark gills: And while we’re talking about gills, no, not every shark species needs to constantly swim in order to breathe! Forcing water over your gills by swimming is called “ram ventilation,” but many shark species are capable of manually pumping water over their gills using a method called “buccal pumping,” as explained in this How Stuff Works blog post. There is also a group of sharks called sevengill sharks, if anyone would care to guess how many gill slits they have. Their scientific name “Hexanchus” translates to “six gills”. And here’s what the actual teeth look like, from photos I took at the Seattle Aquarium’s education collection:ġ.Most shark species have 5 gills slits, but bluntnose sixgill sharks have, um, six gill slits.
0 Comments
Leave a Reply. |