Gas exchange, Biology

Assignment Help:

Gas Exchange

Gill surface area must be large enough to provide adequate exchange of gases. Therefore, highly active fish have largest relative gill area. Figure compares highly active fish with sluggish bottom dwellers. Their relative surface area is also given.

1203_Gas Exchange.png

Figure: Fast swimming fish like makerel have larger gill area than sluggish bottom dwelling fish. The total surface area of gills is expressed per unit per gram body weight of fish.

 For gas exchange to be adequate there should be adequate flow and close contact between the gill and water. To understand how this happen let us look at the structure of a gill in bony fishes as a representative of an aquatic respiratory surface. Gills are enclosed in a gill cavity. This provides protection for the fragile organ and also permits the water to run over the gills in an efficient manner. Gills of fishes consist of several gill arches on either side. The gill arches separate the opercular and P the buccal cavities. From each gill arch extend two rows of gill filaments.


Related Discussions:- Gas exchange

Show the extracellular digestion related to tissue, Q. How is extracellular...

Q. How is extracellular digestion related to tissue and cellular specialization? A variety of specialized tissues and cells appeared with extracellular digestion to provide enz

Source of the bacteria of salmonellosis, Q. Source of the bacteria of Salmo...

Q. Source of the bacteria of Salmonellosis? The initial source of the bacteria is the intestinal tract of birds, reptiles, farm animals, humans and occasionally insects. As int

What is tricuspid valve annuloplasty, Q. What is Tricuspid valve annuloplas...

Q. What is Tricuspid valve annuloplasty? It depends upon the cause of tricuspid regurgitation. Specific therapy is directed towards the particular cause of pulmonary artery hyp

Horse diseases-equine viral arteritis, Equine viral arteritis Equine v...

Equine viral arteritis Equine viral arteritis (EVA) is a highly contagious disease of equines and is caused by equine arteritis virus (EAV), a RNA virus belonging to the genus

Aschelminthes, in what part of the human body aschelminthes found?

in what part of the human body aschelminthes found?

Excretion, Excretory organ for protozoa

Excretory organ for protozoa

Symbiotic interaction - biological stress, Symbiotic interaction - Biologic...

Symbiotic interaction - Biological Stress Presence of symbiotic microorganism can result in differential growth stimulation of those plants which can recognise the beneficial

Illustrate briefly about titanium, Illustrate briefly about titanium I...

Illustrate briefly about titanium It is generally accepted that pure titanium has little cytotoxicity and it is suggested that the plaque induced inflammation may be due to cr

Subphylum sarcodiha, Subphylum Sarcodiha Pseudopodia typically presen...

Subphylum Sarcodiha Pseudopodia typically present; flagella present in developmental stages of some species; free living or parasitic. Superclass - Rhizopoda Loc

What is resting membrane potential of a neuron, What is resting membrane po...

What is resting membrane potential of a neuron? What is the function of sodium potassium pumps in maintaining it?

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