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 would be its final volume, Consider a simple spherical model cell that...

Consider a simple spherical model cell that consists of cytoplasm and a plasma membrane. The cell's initial volume is 2 nL and contains 0.2 M protein. The cell is placed in a la

Explain cell signaling, In multicellular organisms there is a requirement f...

In multicellular organisms there is a requirement for the cells to communicate with one another in order to coordinate their metabolism and growth.  The principal way by  that  cel

Synthesis of sucrose, Many of the glyceraldehyde 3-phosphate produced by th...

Many of the glyceraldehyde 3-phosphate produced by the Calvin cycle in chloroplasts is exported to the cytosol and used to produce the disaccharide, sucrose. 1 st the   glyceralde

What is polypropylenes, Q. What is Polypropylenes? Polypropylenes (PP) ...

Q. What is Polypropylenes? Polypropylenes (PP) (cast PP, Bi-axially oriented PP (BOPP), pearlized PP): Polypropylene is often termed a breathable film. This film is not a

PLASMODIUM LIFE CYCLE, elucidate a life cycle of a plasmodium that causes m...

elucidate a life cycle of a plasmodium that causes malaria

Mastitis, M a s t iti s Mastitis is one the important diseases in ...

M a s t iti s Mastitis is one the important diseases in cows that has serious economic impact on livestock production. The inflammation of mammary gland is associated with

Define effect of feeding method on drug availability, Define Effect of feed...

Define Effect of feeding method on drug availability? The form in which a drug is administered or enters the body can influence its absorption, metabolism or excretion. This be

What is a brain freeze, What is a brain freeze? What is commonly referr...

What is a brain freeze? What is commonly referred to as 'brain freeze' happens when you ingest something that is very cold too rapidly. When the cold touches your soft palate i

List the functions of insulin, Q. List the functions of insulin? a) Ins...

Q. List the functions of insulin? a) Insulin controls the level of the sugar (glucose) in the blood. b) Insulin permits cells to use sugar (glucose) for energy. Cells cannot

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