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 iris coloboma, What is Iris Coloboma Coloboma is a congenital a...

What is Iris Coloboma Coloboma is a congenital abnormality due to non-fusion of the embryonic choroidal fissure. It can affect any part of the eye and may involve the optic ner

M - mode echocardiography, M-Mode was the earliest form of cardiac ultrasou...

M-Mode was the earliest form of cardiac ultrasound used clinically. It displays the amplitude signals of various structures along the length of ultrasound beam with distance or

Explain spontaneous closure of defects in details, Explain Spontaneous Clos...

Explain Spontaneous Closure of Defects in details? Some defects have a tendency towards spontaneous closure and this can influence the timing of intervention. The defects known

Bracketed keys to identifying plants and animals, Q. Bracketed Keys to iden...

Q. Bracketed Keys to identifying plants and animals? In bracketed keys two couplet leads of the same rank are bracketed together. The alternative clues or couplets are written

Explain about the weight imbalance, Explain about the Weight Imbalance? ...

Explain about the Weight Imbalance? You are aware that obesity is one of the major public health problems of the world, Earlier a problem of the developed nations; it is now in

What are gene interactions?, What are gene interactions? What are the three...

What are gene interactions? What are the three main types of gene interactions? The Gene interaction is the phenomenon in which a given phenotypical trait is conditioned by two

Determine the goal of a bcc programme, Determine the Goal of a BCC Programm...

Determine the Goal of a BCC Programme The overall goal of BCC programs for diabetes mellitus is to promote behaviors that control blood sugar and prevent complications. Thes

Homologue, What would be the likely immune response ability of an individua...

What would be the likely immune response ability of an individual with a deletion of a Class II gene of the MHC on one chromosome and a nonsense mutation at the beginning of the sa

Name the one autosomal dominant and autosomal, Name the one autosomal domin...

Name the one autosomal dominant and autosomal recessive Mendel an disorder in Humans. a) How is the action of exonucluease dissimilar from that of end nuclease? b) India has

Define the clotting factors, Q. What are clotting factors? Clotting fac...

Q. What are clotting factors? Clotting factors are substances (coenzymes, enzymes, reagents) necessary for the clotting stages to happen. Besides those triggering reagents and

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