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

What is autoclave sterilization, Q. What is Autoclave sterilization? Wo...

Q. What is Autoclave sterilization? Word "autoclave" means self locking and is used to denote an apparatus that sterilizes by use of steam under pressure. It operates on same

Determine general principles of allergy management, Determine General Princ...

Determine General Principles of Allergy Management? The four general principles of allergy management include: 1.  Avoid factors that cause symptoms. 2.  Use appropriate

Explain long-term risk estimation, Explain Long-term Risk Estimation ? ...

Explain Long-term Risk Estimation ? Many studies have examined long-term risks associated with risk factors using traditional epidemiological methods. Framingha investigators

Class turbellaria, plz answer me how I arrange my topic with its order ?

plz answer me how I arrange my topic with its order ?

What is the significance of torsion, What is the significance of torsion? ...

What is the significance of torsion? An unusual twisting of the gastropod body which has left all members of class with an asymmetric body plan and a U-shaped alimentary tract,

Illustrate about the term- hypnagogic hallucinations, Illustrate about the ...

Illustrate about the term- Hypnagogic hallucinations  Hypnagogic hallucinations (Greek, 'hypnos' meaning "sleep," and 'gogic' meaning "enter into") are episodes of auditory, vi

Freeze fracture electron microscopy, Freeze Fracture Electron Microscopy ...

Freeze Fracture Electron Microscopy Freeze fracture electron microscopy i a technique lo reveal the surface features of hydrophobic interior of cell membrane. In this technique,

Phlum protoza, what are the some examples of phlum protoza?

what are the some examples of phlum protoza?

What is the mendel’s second law, What is the Mendel's second law? The M...

What is the Mendel's second law? The Mendel's second law postulates that two or more different traits are also conditioned by two or more pair of different factors that every i

Define fluids requirement to avoid underweight problem, Define Fluids requi...

Define Fluids requirement to avoid underweight problem? Take fluids only after a meal instead of with or before meals so that food intake is not reduced. High calorie nourishin

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