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

List a few important uses of food hydrocolloids, List a few important uses ...

List a few important uses of food hydrocolloids. A few important uses of food hydrocolloids are: to increase viscosity and to stabilize food products. Its other uses  include u

Coronal disassembly devices-grasping instruments, Grasping instruments ...

Grasping instruments -Plier or clamp forceps -put piece of rubber in the plier                                 -applied on the buccal and lingual surface -make pressure to

How infections and infestations cause pem, How Infections and Infestations ...

How Infections and Infestations cause PEM? Childhood infections (viral/bacterial) and parasitic infestations are almost always associated with PEM. These cause anorexia (loss o

Explain arrayed library, Arrayed library: An individual primary recombinan...

Arrayed library: An individual primary recombinant clones (hosted in the phage, cosmid, YAC, or other vector) which are placed in two- dimensional arrays in microtiter dishes. Eac

Define the spray drying method, Define the Spray Drying Method? Spray d...

Define the Spray Drying Method? Spray drying is a unique drying process since it involves both particle formation and drying. It is most suitable for drying of liquid foods suc

Explain about cloning, What is Cloning Cloning: Somatic (ie 2N) cell fr...

What is Cloning Cloning: Somatic (ie 2N) cell from original female cat removed (nucleus has mutated allele), fertilised egg extracted from another cat, nucleus removed, and egg

Dietary modification, Q. Dietary modification? Dietary modification inc...

Q. Dietary modification? Dietary modification includes nutritional support that allows normal growth and development. Plasma phenylalanine concentration between the range of 40

How much carbohydrates taken for management of obesity, How much Carbohydra...

How much Carbohydrates taken for management of obesity? Carbohydrates in the form of non-starch poly-saccharides provide bulk and satiety value to the reducing diet. They are a

Factors limiting the productivity of aquatic habitats, Factors Limiting the...

Factors Limiting the Productivity of Aquatic Habitats Sunlight and oxygen are the two most important limiting factors of the aquatic ecosystems. This distinguishes them from t

Global alteration of brain functioning - sleep, Q. Global alteration of bra...

Q. Global alteration of brain functioning - Sleep? Sleep involves a global alteration of brain functioning, and occupies one third of our lives, The transition from waking to

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