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

Respiratory distress syndrome, Respiratory Distress Syndrome: Respirat...

Respiratory Distress Syndrome: Respiratory distress in a  newborn is  a challenging problem.  It  accounts for significant morbidity and mortality. It occurs  in  4 to 6 per c

Egg envelopes, Egg Envelopes Like any other cell, all the eggs are co...

Egg Envelopes Like any other cell, all the eggs are covered by the cell membrane or plasmalemma It is with two layers of about 50 A? (unit membrane) separated by a gap of 60

Explain hepatitis a and b, Hepatitis A/B  A combination vaccine contain...

Hepatitis A/B  A combination vaccine containing the same antigenic components as  Engerix-B and pediatric  Havrix (Twinrix - GlaxoSmithKline) is available for patients >18 year

Rationale of dental implant - aging population, Aging population is an impo...

Aging population is an important factor to be considered in implant dentistry. Life expectancy has increased significantly past the age of retirement. Social pleasures continue thr

Demography, DEMOGRAPH Y - Scientific study of vital & social statistic...

DEMOGRAPH Y - Scientific study of vital & social statistics such as births, deaths, disease etc. of human population is called demography. It deals with - 1.      Change

Mutualist exploration of cellulose digestion, Q. What is meant by "mutualis...

Q. What is meant by "mutualist exploration of cellulose digestion", a phenomenon that occurs in some mammals and insects? Herbivorous animals eat great amounts of cellulose a s

Effect on microbial growth and activity, Effect on Microbial Growth and Act...

Effect on Microbial Growth and Activity Bacteria require higher aw for growth than fungi. Gram-negative bacteria have higher requirements than gram positives. Most spoilage ba

Fruits why not glucose, Sucrose is commonly used to preserve fruits why not...

Sucrose is commonly used to preserve fruits why not glucose? Ans) Glucose is reactive due to its open-chain form having an aldehyde group.

What is the difference among sexual spores and gametes, What is the differe...

What is the difference among sexual spores and gametes? Do humans present sexual spores or gametes? Sexual spores are structures formed from meiosis with ploidy (number of chro

Phylum annelida, describe the diversity in the feeding habits and locomotio...

describe the diversity in the feeding habits and locomotion of annelids

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