Ram ventilation, Biology

Assignment Help:

Ram Ventilation

Some fish do not use pumping action for gill ventilation. It has been known for long that large tunas cannot be kept alive in captivity unless they are put in circular tanks where they can swim continuously. The fish swim with their mouths partly open and there are no visible breathing movements. Water flows continuously over their gills. This is known as ram ventilation.

It is now known that many fish breathe by pumping at low speed and change to ram ventilation at high speed. In this case the work of breathing is transferred from the muscles of the opercular pump to the muscles of the body and tail. However, ram ventilation is more economical as far as energy consumption is concerned than opercular pumps at high rates required for fast swimming.


Related Discussions:- Ram ventilation

Explain the management of furcal perforation, Explain the Management of Fur...

Explain the Management of Furcal Perforation 1 st isolate the perforation site. If the perforation is mechanical accidentally occurred:   a- It is probably

Explain the management of canal impediment, Management of Canal Impediment ...

Management of Canal Impediment a) Impediments are iatrogenic mishaps resulting from vigorous instrument short of the b) Appropriate working length and failure to confirm api

Bacillary dysentery and its etiology, Bacillary Dysentery   You have le...

Bacillary Dysentery   You have learnt about the diarrhoea in the foregoing sub-section, now let us take for example a child who has loose motion which contains blood and mucus

Explain the working of antioxidant function, Explain the working of antioxi...

Explain the working of antioxidant function? The antioxidant function depends on the number of hydroxyl groups and their positions. Among the various derivatives, flavonoids ar

Define the symptoms of yersinia enterolytica infection, Normal 0 ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4 Define the Symptoms

Explain the toxicity of folate, Explain the Toxicity of Folate? There ...

Explain the Toxicity of Folate? There is no evidence to suggest that it is possible to consume sufficient natural folate to pose a risk of toxicity. However, this clearly does

Define three major steps for study of genetic family tree, What are the thr...

What are the three major steps for a good study of a genetic family tree? Step 1: Determine whether the studied phenotypical form has a dominant or the recessive pattern. Step

What are venous vessels, Q. What are venous vessels, venules and veins? ...

Q. What are venous vessels, venules and veins? Venous vessels are every blood vessel that carries blood from the tissues to the Venules, Veins and heart are venous vessels. Ven

Female reproductive disorders-dystocia, Dystocia Dystocia or difficult...

Dystocia Dystocia or difficult calving is a condition where help is required as providing traction, repositioning of fetus, foetotomy or caesarotomy. Generally, ease of calvin

Explain sinus venosus defect with partial anomalous venous, Explain Sinus V...

Explain Sinus Venosus Defect with Partial Anomalous Venous Connection ? In this defect the atrial septal defect is situated just below the orifice of superior vena cava above

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd