Explain class bivalvia in animal kingdom, Biology

Assignment Help:

Explain Class Bivalvia in animal kingdom?

This name of this Class reflects the group's most distinguishing feature. Clams, oysters, scallops and mussels all have two shells that are held together by a hinge ligament at the back. One or two muscles (adductor muscles) are used to pull the shells together, forming a tight seal. Scallops are able to "swim" through the water by "clapping" their shells together rhythmically. The mantle secretes the material that makes up the shell. Another bivalve characteristic is a powerful, muscular foot that can be extended great lengths to help them move about or burrow into the sand or mud.

There are other features that distinguish bivalves from the gastropods or cephalopods. Bivalves do not have an anterior head region, and because they filter the water for food, they also lack a rasping radula. Siphons formed by the mantle provide for the circulation of water past the gills for gas exchange and filter feeding. Although most species of bivalves are marine in distribution, many species do live in fresh water.

 


Related Discussions:- Explain class bivalvia in animal kingdom

Estimation of depth of burn injury, Estimation of Depth of Burn Injury: ...

Estimation of Depth of Burn Injury: A thermal injury is described as partial thickness or full thickness, depending on the depth  and  severity of tissue damage a) First D

Explain about mandible, Q. Explain about Mandible? In the mandible, att...

Q. Explain about Mandible? In the mandible, attached keratinized tissue normally atrophies with the underlying bone. As a result there is generally a relatively narrow band of

Late recurrence of artgirza--recurrence of angina, Late recurrence of a...

Late recurrence of artgirza: This is a reflection of progress of disease in the native coronary arteries distal to the grafts or narrowing or blockage of one or more of the g

Determine the lateral cephalometric skull view, Determine the Lateral Cepha...

Determine the Lateral Cephalometric Skull View The use of this modality is limited in preoperative evaluation in implant placement for advance cases where there is a need for b

Determine the term - angiomas, Determine the term - Angiomas Angiomas a...

Determine the term - Angiomas Angiomas are congenital collections of abnormal vessels that divert the normal flow of blood. These capillaries, venous, or arteriovenous (A-V) ma

How does the male gamete penetrate the egg cell, How does the male gamete p...

How does the male gamete penetrate the egg cell? How does the female gamete protect itself from the entrance of more gametes after the entrance of the first sperm cell? The spe

Illustrate the structure of the central nervous system, Q. What is the stru...

Q. What is the structure of the central nervous system that regulates pulmonary respiration? The reaction is catalyzed by the enzyme carbonic anhydrase present in red blood cel

What are the two mains divisions of the chordate phylum, What are the two m...

What are the two mains divisions of the chordate phylum? Chordates are separated into protochordates (cephalochordates and urochordates) and vertebrates. Life Kingdoms Revi

Incubator, Incubator The incubators are essential to provide an ideal ...

Incubator The incubators are essential to provide an ideal micro environment. The main functions are: isolation, maintenance of thermo neutral ambient temperature, desired h

Pathophysiology and medical mangement of acute renal failure, Pathophysiolo...

Pathophysiology of Acute Renal Failure It is usually reversible but the deviation of physiologic function can be extreme and mortality in pediatric age group remains high. Th

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