Gas exchange, Biology

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.

Posted Date: 1/15/2013 6:50:46 AM | Location : United States







Related Discussions:- Gas exchange, Assignment Help, Ask Question on Gas exchange, Get Answer, Expert's Help, Gas exchange Discussions

Write discussion on Gas exchange
Your posts are moderated
Related Questions
What are some examples of human cells that produce proteins for exportation? Which cytoplasmic organelle is expected to be well-developed and abundant in those cells? Specializ

Is the transportation of gases in tracheophytes made through the vascular tissues? The Carbon dioxide and The Oxygen are not transported through the xylem or phloem. These gase

ORGA N TRANSPLANT REJECTION - Major histocompatibility complex is responsible for stimulating the rejection of tissue MHC is set of genes that code for cell surface glycopr

Explain Matching energy intake to energy expenditure? To be in energy balance, an athlete needs to consume about the same number of calories that he or she expends on a daily

What is Sex-linked Traits in genetics? The X-chromosomes carry genes for traits other than sex characteristics. Morgan discovered these sex-linked traits while observing the in

Question 1 Write a short note on the following- Transfection Synthetic seeds Transgenic crops Agrometerology Question 2 Describe any 5 screening techniques use

Q. Urine Examination of the diabetes Patient? Generally when blood testing facilities are not available, urine is tested for the presence of sugar. A urine sample shows presenc

Rare Species - Wildlife These are those species whose numbers are few or they live in such small areas or in such unusual environments (endemics), that they could quickly disa

Successive Changes in Animal Life during Hydrosere The successive changes in plant communities in the different seral communities of a hydrosere. The question arises, is ther

State the Definition of respiration Respiration is an act of breathing. (i.e. rise and fall of the chest).  Respiration hastwo parts i.e. inhalation and exhalation. When we bre