Explain the nervous system characterized in echinoderms, Biology

Assignment Help:

How are the symmetry and the nervous system characterized in echinoderms?

Adult echinoderms, with cnidarians, are the animals that present radial symmetry, i.e., their body structures are dispersed around a center. The radial symmetry in echinoderms though is a secondary radial symmetry, as their larval stage has bilateral symmetry and the radial pattern appears only in adult individuals (there are some few adult echinoderms with lateral symmetry). All other animals have lateral symmetry with exception of poriferans (no symmetry is explained for them).

Echinoderms do not present cephalization and they have a disperse network of nerves and neurons made of a neural ring around the mouth and of radial nerves that ramify to follow the pentaradial structure of the body.

 


Related Discussions:- Explain the nervous system characterized in echinoderms

State the limitations of intra oral periapical radiographs, Limitations of ...

Limitations of Intra Oral Periapical Radiographs  It is not optimal in pre operative planning of cases with severely resorbed ridges  Anatomical structure of importance can'

Nucellus - seed, Nucellus - Seed In a large majority of flowering plan...

Nucellus - Seed In a large majority of flowering plants the nucellus is gradually utilized by the endosperm or embryo. In leguminous seeds, for example, the nucellus degenerat

Viruses, are viruses cellular organisms

are viruses cellular organisms

Define the sun and solar drying method, Define the Sun and Solar Drying Met...

Define the Sun and Solar Drying Method? The make use of solar energy to preserve the food items is mainly the oldest form of food reservation and is still practiced today for f

Cost of accidents, Cost of Accidents Immediate Cost Immediate c...

Cost of Accidents Immediate Cost Immediate cost takes into account the loss of work, damages to equipment and facilities which have to repaired and restored or replaced

Classification of poisonous arthropods, what is the classification of poiso...

what is the classification of poisonous arthropods according to their mode of toxicity to human

Explain the secondary structure of proteins, Explain the Secondary structur...

Explain the Secondary structure of proteins The secondary structure of a protein involves the way that the chain of amino acid either twists or folds back upon itself to form a

Tunnel subvalvar stenosis, Tunnel Subvalvar Stenosis :  This variety ...

Tunnel Subvalvar Stenosis :  This variety is less common and extends from sub aortic area for a variable length of 10-30 mms (tunnel stenosis). In the severe variety, the tun

Explain resistance to infection in nutritional care, Explain Resistance to ...

Explain Resistance to Infection in Nutritional Care? Amino acids help to build the body's defence mechanisms like antibodies, blood cells, hormones and enzymes so as to prevent

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