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

Discuss about brain, Brain Brain is a part of central nervous system wh...

Brain Brain is a part of central nervous system which lies in the skull. Source: Sears and Windwood, Anatomy and Physiology for Nurses The different parts of the bra

Explain the bulimia nervosa, Explain the Bulimia Nervosa? Diagnostic Cr...

Explain the Bulimia Nervosa? Diagnostic Criteria Bulimia Nervosa patients, unlike those of anorexia nervosa with binge and purge subtype, are typically within the normal weight

What is digestion, What  is digestion? The  ingested food material  is...

What  is digestion? The  ingested food material  is  broken down  into smaller constituents which  are assimilable  by  the  blood.  The  process  through which  the major nutr

What is adp phosphorylation, What is ADP phosphorylation? What respectively...

What is ADP phosphorylation? What respectively are photophosphorylation and oxidative phosphorylation? ADP phosphorylation is the addition of one inorganic phosphate in the mol

Explain cosmid, Cosmid: The type of artificially constructed vector taken ...

Cosmid: The type of artificially constructed vector taken in use for cloning the 35-45 kb of DNA. These are plasmids carrying the phage l cos site (which permits packaging into l

Define requirements of sodium during pregnancy period, Define requirements ...

Define requirements of Sodium during pregnancy period? As you know, sodium plays a role in fluid balance. Sodium metabolism is altered during pregnancy under the stimulus of a

Describe the structure of chromatin and chromosomes, Describe how the struc...

Describe how the structure of chromatin and chromosomes facilitates the following functions: a) DNA packaging. b) Regulation of gene expression.  c) Replication at the

Illustrate the metabolic processes of vitamin B, Illustrate metabolic proce...

Illustrate metabolic processes of vitamin B In the human and animal metabolism, they form a functional unit, since, as components of the various coenzymes, they are essential

Hydrarch - ecology, Hydrarch - Ecology Its various stages are well stu...

Hydrarch - Ecology Its various stages are well studied in ecosystem like ponds, pools and lakes. Since pond is a fresh water ecosystem, the succession in it is also referred t

Respiration, lesson plan practical requirements

lesson plan practical requirements

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