I don't know anything about obligatory ram ventilators, but I do like fluffy kittens.
On 6 March 2014 17:20, <[email protected]> wrote: > > On Thursday, March 6, 2014 3:16:03 AM UTC, Liz R wrote: > >> On 6 March 2014 15:47, Russell Standish <[email protected]> wrote: >> >>> Could be - I have heard the factoid that some sharks need to keep >>> moving. What I don't know is whether it is an urban myth or not. >>> >>> As ever, the fount of all knowledge has the answer! >> >> From http://en.wikipedia.org/wiki/Shark#Respiration >> Respiration >> >> Like other fish, sharks extract oxygen from seawater as it passes over >> their gills <http://en.wikipedia.org/wiki/Gill>. Unlike other fish, >> shark gill slits are not covered, but lie in a row behind the head. A >> modified slit called a spiracle <http://en.wikipedia.org/wiki/Spiracle>lies >> just behind the eye, which assists the shark with taking in water >> during respiration <http://en.wikipedia.org/wiki/Aquatic_respiration>and >> plays a major role in bottom-dwelling sharks. Spiracles are reduced or >> missing in active pelagic <http://en.wikipedia.org/wiki/Pelagic> sharks.[ >> 21] <http://en.wikipedia.org/wiki/Shark#cite_note-Gilbertson-21> 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. A >> small number of species have lost the ability to pump water through their >> gills and must swim without rest. These species are *obligate ram >> ventilators* and would presumably >> asphyxiate<http://en.wikipedia.org/wiki/Asphyxiate>if unable to >> move.Obligate ram ventilation is also true of some pelagic bony fish species. >> [32] <http://en.wikipedia.org/wiki/Shark#cite_note-32> >> > obligate ram ventilators are the original and TRUE shark and it's pure > Political Correctness gone mad those gill suckers - those SINO's - get same > named. The agenda of diversity and equality has reached sharks now and you > buy every word like a little sheep bah bah bah to you. > > > alternatively, I do so like a happy ending...where everyone gets a salty > little slice of the sticky 'Right' cake (in the voice of dame edna > Everett ) > > more generally, it's kinda fun not googling to the end, and we all seem to > have tacitly partook. Someone had to google in the end of course, and your > timing was wonderful my dear, you sweet fragile thing (voice of Edgar in > the flavour of: http://www.youtube.com/watch?v=LS37SNYjg8w) > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/everything-list. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/groups/opt_out.
