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

What is the meaning of trocophore, What is the meaning of Trocophore? T...

What is the meaning of Trocophore? This free-swimming ciliated larval stage is found in numerous animal phyla including Mollusca and Annelida. Larvae has a unique circle of pre

State the female reproductive system, State the Female Reproductive System ...

State the Female Reproductive System The female reproductive organ consists of the following: Uterus receives fertilied ovum and featus develops in it Two ovaries produce

Analysis of developmental potency of nuclei, Analysis of Developmental Pote...

Analysis of Developmental Potency of Nuclei The instances given above and many other observations and experimental results of this nature provide tough support to the hypothes

Extravascular compression, Most of the coronary blood flow to the left vent...

Most of the coronary blood flow to the left ventricular myocardium occurs during diastole. Thus the contracting heart obstructs its own blood supply. The systolic compressive force

What are the grasslands of north america, What are the grasslands of North ...

What are the grasslands of North America and of South America respectively called? The steppe grasslands of North America are known as prairies. The grasslands of South America

Explain the assessment of zn status, Explain the Assessment of Zn Status? ...

Explain the Assessment of Zn Status? Sensitive indices for assessing zinc status are unknown at present. Static indices, such as zinc concentration in plasma, blood cells and h

Tuberculosis, Tuberculosis Tuberculosis is caused by a Bacillus-myco...

Tuberculosis Tuberculosis is caused by a Bacillus-mycobacterium tuberculosis, a gram- positive and acid-fast organism. It is communicable disease. Mode of Transmissio

Determine the high blood plasma levels of insulin, A patient has total dest...

A patient has total destruction of all of the beta-islet cells of the pancreas.  Prior to receiving treatment, this patient will have A. high blood plasma levels of glucose.

Determine the functions of vitamin c, Determine the Functions of Vitamin C?...

Determine the Functions of Vitamin C? The vitamin C is involved in several physiological and biochemical functions in the body. Ascorbate is the biochemically active form of t

Temperature stress, Temperature Stress We know that temperature alongwi...

Temperature Stress We know that temperature alongwith water is an important influence on the geographical distribution and range of organisms. Every organism is restricted to a

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