Gaseous exchange, Biology

Assignment Help:

Gaseous Exchange

Gaseous exchange is take place on by both mantle and the gills. The gills of most bivalves are highly changed for filter feeding. They are derived from the primitive ctenidial by lengthening of the filaments on every side of filamentous axis. As the ends of long filaments became folded back towards the central axis; the ctenidial filaments took the shape of a long slender 'W'. The filaments lying beside each other became joined through ciliary junctions or tissue fusions, forming plate like lamellae along with many vertical water tubes inside. Thus water enters the incurrent siphon, propelled by ciliary action, then enters the water tubes by pores between the filaments in the lamellae proceeds dorsally into a common suprabranchial chamber and then out of the ex-current aperture.


Related Discussions:- Gaseous exchange

Myocardial energetics, The oxidation of substrates like free fatty acids (F...

The oxidation of substrates like free fatty acids (FFA), glucose, lactate and ketone bodies results in the energy of Adenosine triphosphate (ATP) and Creatine phosphate (CP). The s

Fat burn, how to burn more and more adipose tissues

how to burn more and more adipose tissues

Define the composition of potato dextrose agar, Define the Composition of P...

Define the Composition of Potato Dextrose Agar? This media is used for cultivation of yeasts, fungi and moulds. Potato (Peeled) - 200.0 gm Dextrose - 20.0 gm Agar - 15

Can you describe about hematosis, Q. What is hematosis? In humans where doe...

Q. What is hematosis? In humans where does hematosis occur? Hematosis is the oxygenation of the blood, venous blood (oxygen-poor) after hematosis is transformed into arterial b

Essay, “Define nosocomial infections. Discuss the factors that might influe...

“Define nosocomial infections. Discuss the factors that might influence whether a patient may acquire nosocomial infection. How might these risks be reduced?”

Factors affecting water requirements of microorganisms, Q. Factors Affectin...

Q. Factors Affecting Water requirements of microorganisms? Factors that may affect aw requirements of microorganisms include: 1. Kind of solute employed to reduce the aw: F

Surface run-off - causes of water pollution, Surface Run-off - Causes of Wa...

Surface Run-off - Causes of Water Pollution The surface run-off from cultivated lands where inorganic fertilisers, pesticides, insecticides and rich manure are applied and sol

What is phosphorylation, What is phosphorylation? What are some biological ...

What is phosphorylation? What are some biological processes in which phosphorylation plays a critical role? Phosphorylation is the name given to processes of the addition of ph

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