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

How can heart be affect, How can Heart be affect Heart may be affected ...

How can Heart be affect Heart may be affected in two ways. One of the complications of diabetes is autonomic dysfunction which may disturb rhythm of heart beat and may lead to

Define heart rate (hr) method - aerobic capacity, Define Heart Rate (HR) M...

Define Heart Rate (HR) Method -  aerobic capacity? An alternative method for determining aerobic capacity involves the measurement of heart rate. Heart rate is linearly associa

What is symbiotic nitrogen fixation, a) What is symbiotic nitrogen fixatio...

a) What is symbiotic nitrogen fixation? b) Name the two protein components required for this process. Define their role.

Determine the synaptic process, Since neurotransmitters are not consumed in...

Since neurotransmitters are not consumed in the synaptic process, what are the mechanisms to decrease their concentrations in the synaptic cleft after they have been used? As t

Implantation, Implantation : It is the process in which the blastocyst (de...

Implantation : It is the process in which the blastocyst (developing zygote) is attached to the glandular uterine wall and then embedded in the wall of uterus. 1) In human bein

Define about the polyphenols, Define about the Polyphenols? We now come...

Define about the Polyphenols? We now come to a group of compounds, which were until recently considered to adversely influence nutrient absorption or giving colour to foods e.g

Lymph, why is it known as middle man

why is it known as middle man

Plant reproduction, How does being able to reproduce asexually benefit the ...

How does being able to reproduce asexually benefit the plant?

Define about the ascorbic acid (vitamin c), Define about the Ascorbic acid ...

Define about the Ascorbic acid (vitamin C)? Ascorbic acid was discovered as the anti-scurvy vitamin. Vitamin C (chemical names ascorbic acid and ascorbate) is the six-carbon la

Duck plague (duck virus enteritis), Duck plague (duck virus enteritis) ...

Duck plague (duck virus enteritis) Duck plague is the most serious disease caused by a herpes virus (Anatid herpes virus). Though antigenically homogenous, differences in virul

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