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

Variations on translation, Which of the following variations on translation...

Which of the following variations on translation would be most disadvantageous for a cell? A) translating polypeptides directly from DNA B) using fewer kinds of tRNA C) having only

Can you define musculoskeletal system, Q. Which are the organs that are par...

Q. Which are the organs that are part of the musculoskeletal system? The key tissues and organs that are part of the musculoskeletal system in humans are the cartilages, the mu

Assistance required, I have been getting assignments to write. But not for ...

I have been getting assignments to write. But not for the subject I have aptitude for.Please help

Explain H - shaped incision, Q. Explain H - Shaped Incision? This type ...

Q. Explain H - Shaped Incision? This type of incision is especially useful for: The anterior maxilla or mandible. Accurately identified implant position. Exposure o

What is isoniazid, Isoniazid  Serum aminotransferase activity increases...

Isoniazid  Serum aminotransferase activity increases in 10% to 20% of patients taking isoniazid, especially in the early weeks of treatment, but often returns to normal even wh

Explain risk factors for cad, Explain Risk Factors For CAD? As has been...

Explain Risk Factors For CAD? As has been noted, CAD is very common among the Indians and many studies have been undertaken to find out the reasons behind this predilection. Wh

What in genetics is hybridization, What in Genetics is hybridization? H...

What in Genetics is hybridization? Hybridization in Genetics is the crossing of individuals from "pure" and dissimilar lineages in relation to a given trait, i.e., the crossing

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