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

Define the determination of completion of reaction, Define the Determinatio...

Define the Determination of Completion of Reaction ? Several methods are used to determine when the reaction is complete. Some of these include (a) Observing an indicator (c

Explain about force-gated channel, At 1:00AM, Neuron A is at rest with memb...

At 1:00AM, Neuron A is at rest with membrane potential equal to -70 millivolts; it is producing no action potentials.  The threshold for an action potential in neuron A is -55 mill

Explain food applications of xanthan, Explain Food Applications of xanthan ...

Explain Food Applications of xanthan Xanthan gum is mainly considered to be non-gelling and used for the control of viscosity due to the tenuous associations, endowing it w

Cell, The scientist who described cells as “many little boxes” was

The scientist who described cells as “many little boxes” was

Defense mechanisms used in diabetes mellitus, Q. Defense mechanisms used in...

Q. Defense mechanisms used in Diabetes Mellitus? Defense mechanisms are the strategies to cope with the real situation and to maintain self-image. Healthy persons normally use

Relationship between the ovulation and menstrual cycle, Q. What is the rela...

Q. What is the relationship between the ovulation and menstrual cycle? Ovulation is the releasing of the female gamete from the ovary and Ovulation is a periodical event that o

Onset of puberty in male, ONSE T OF PUBERTY IN MALE Puberty is the ...

ONSE T OF PUBERTY IN MALE Puberty is the period when reproductive organs become functional. It is attained at the age of 13-16 yrs. It is stimulated by testasteron. I

What are the applications of nicotinic acid, What are the Applications of N...

What are the Applications of Nicotinic acid Nicotinic acid is mainly used in the vitamin fortification of flour, macaroni and noodle products. Independent of its vitamin effic

Determine the types of neuropsychology, Determine the types of neuropsychol...

Determine the types of neuropsychology The practise in neuropsychology is roughly divided into two approaches. Some practitioners use standard comprehensive neuropsychological

Do you know how ketoacidosis develops, Q. Do you know how ketoacidosis deve...

Q. Do you know how ketoacidosis develops? The chain of reaction begins with insufficient insulin to meet the needs of the body. Several factors then work together. These inclu

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