Locomotion in annelida, Biology

Locomotion in Annelida

Before we discuss the details of locomotion in annelids, we have to recapitulate the major subdivisions of the phylum Annelida. Phylum Annelida contains Polychaeta, Oligochaeta and Hirudinea. The Polychaeta, as generally represented by the marine bristle worm Nereis, have parapodia with numerous setae. The Oligochaeta, comprising mainly the earthworms and a few aquatic species, do not possess parapodia and have fewer setae. The Hirudinea, represented by leeches, lack parapodia and setae but suckers are present on either extremities of the body. These are employed in locomotor activity. Thus, the locomotor components in Annelida include

i. Body musculature,

ii. Hydrostatic skeleton, and

iii. Locomotor structures.

So, Locomotion is the result of co-ordinate effort of all these.

Posted Date: 2/4/2013 1:52:38 AM | Location : United States







Related Discussions:- Locomotion in annelida, Assignment Help, Ask Question on Locomotion in annelida, Get Answer, Expert's Help, Locomotion in annelida Discussions

Write discussion on Locomotion in annelida
Your posts are moderated
Related Questions
Classification of the river zones The course of a river can be classified in two ways Firstly by its physical characteristics and Secondly by the presence or absen

Why do we need a family of proteins for cell adhesion (what is the advantage of having a family of proteins?)

Diet Continue diet as prescribed at hospital. Some may continue fluid and salt restriction, some may have to restrict iron and Vitamin K rich food stuff. The patient needs t

Q. What are the main intraspecific ecological interactions? The major harmonious intraspecific ecological interactions are societies and colonies. The major inharmonious intras

what is the structural formula for Galactose?

Q. What is inflammation? Inflammation is the initial response of the unspecific defense system versus aggressions against the body the aggressions may be caused by trauma, infe

Q. How are ecological interactions classified? Ecological interactions are classified as interspecific or intraspecific interactions and as harmonious or inharmonious interacti

advantages of spread plate method over pour plate method

Explain congenital heart disease ? No systematic surveys have been conducted to estimate the incidence of CHD at birth in India and other developing countries. As a result ther

Define the Toxicity of Vitamin K? Vitamin K, does not produce any toxic effects in doses (10-20 mg) normally used for the treatment or subjects suffering from disorders of liv