Locomotion in annelida, Biology

Assignment Help:

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.


Related Discussions:- Locomotion in annelida

Indications for surgery-tricuspid valve disease, Indications for Surgery : ...

Indications for Surgery : Echocardiography or right heart catheterization can quantify tricuspid stenosis. It is categorized as Tricuspid valve repair is advised when ther

Calculate the electric potential, The three charges in the are at the verti...

The three charges in the are at the vertices of an isosceles triangle. Let q = 7.00 nC and calculate the electric potential at the midpoint of the base.

Nutrition - autotrophic nutrition, AUTOTROPHI C NUTRITION Pr...

AUTOTROPHI C NUTRITION Preparation of organic food from the inorganic materials in the living body. May be photoautrophic, e.g. Euglena virdisima. May be chemo

Magnitude of healthcare needs, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

What do biomass pyramids represent, What do biomass pyramids represent? ...

What do biomass pyramids represent? Biomass pyramids show the sum of the masses of the individuals that participate in each trophic level of a food chain.

Define precautions for determination of inorganic phosphorus, Define Precau...

Define Precautions for Determination of Inorganic Phosphorus? 1. All reagents should be added in the order mentioned. 2. Allow 10 minutes for the colour to develop in each t

What are interferons, Interferons are small glycoproteins formed by virus-i...

Interferons are small glycoproteins formed by virus-infected cells that inhibit viral infection. They are heterogeneous. Gamma interferons induce MHC class II antigens in macrophag

Leucosolenia, characteristics of leucosolenia?

characteristics of leucosolenia?

What is the role of stomach in human body, What is the role of Stomach in h...

What is the role of Stomach in human body? The stomach serves both to digest food and to hold it so that it can be gradually released into the small intestine. Food stays in th

Gregor mendel''s law of independent segregation, Gregor Mendel's Law of Ind...

Gregor Mendel's Law of Independent Segregation referred to which of the following genetic elements? A. Alleles of two genes that reside on the similar chromosome B. Alleles

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