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

Why photoperiodism affect the flowering of some plants, How does the photop...

How does the photoperiodism affect the flowering of some plants? Flowering is a typical and simple to observe instance of photoperiodism. Most flowering plants flower only duri

The population thus contains secretors, The A and B antigens in humans may ...

The A and B antigens in humans may be found in water-soluble form in secretions, including saliva, of some individuals (Se/Se and Se/se) but not in others (se/se). The population t

01.03 New Technology , What is the best microscope to get a detailed view o...

What is the best microscope to get a detailed view of the parts inside of a preserved plant cell? Transmission electron microscope Scanning electron microscope Compound li

What is lipids, Define lipids 'lipids' defines substances as oils, fats...

Define lipids 'lipids' defines substances as oils, fats and waxes which can be only characterized by a large array of properties.  They are in general: -  coming from plant

Define biocompatible and biodegradable material, 1. Define each term and gi...

1. Define each term and give an example of an application that uses the following: a. Biocompatible material b. Biodegradable material c. Biomimetic

Determine nutritional requirements for high altitude, Determine Nutritional...

Determine Nutritional Requirements for High Altitude? High terrestrial altitudes and mountains have aroused great fascination and cham for mankind. Every year millions of peopl

Define endocrine or hormonal disorders - infertility, Define Endocrine or H...

Define Endocrine or Hormonal Disorders - Infertility Infertility can be caused by endocrine disorders, long-term sequelae of sexually, transmitted infections, puerperal sepsis,

How does the male gamete penetrate the egg cell, How does the male gamete p...

How does the male gamete penetrate the egg cell? How does the female gamete protect itself from the entrance of more gametes after the entrance of the first sperm cell? The spe

Symptoms of constipation, Q. show the Symptoms of constipation? Have yo...

Q. show the Symptoms of constipation? Have you ever suffered from constipation? Do you recall the symptoms associated with the problem? Yes, the symptoms were specific to havin

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