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

Define intermediary metabolites of an athletes, Define Intermediary Metabol...

Define Intermediary Metabolites of an Athletes? Coenzyme Q10 - for the physically active; Co-Q 10 activates cell energy. While you carry out any physical act; run, jump, throw,

What are some prophylactic measures for tapeworm infections, What are some ...

What are some prophylactic measures for tapeworm infections? The main prophylactic measures against taeniasis and cysticercosis are: not to ingest raw or badly cooked swine or

Explain interactions of macrominerals with other nutrients, Explain Interac...

Explain Interactions of Macrominerals With Other Nutrients? Various nutrients interact with minerals thereby affecting their bioavailability. These interactions occur at differ

Define diet for treatment for protein energy malnutrition, Define Diet for ...

Define Diet for Treatment for Protein Energy Malnutrition? Treatment of cases of kwashiorkor or marasmus involves mainly providing appropriate nutrition support. The child shou

What are the inferior trophic levels, Can the amount of available energy in...

Can the amount of available energy in a given trophic level be larger than the available energy in inferior trophic levels? What does that condition means to the conformation of th

Osteoporasis, OSTEOPORASIS - Reduction in bone tissue mass causing weak...

OSTEOPORASIS - Reduction in bone tissue mass causing weakness of skeletal strength. It leads to crush fracture. It occurs in pastmenopausal women & elderly man. Common

Explain the techniques of surgical correction , Explain  the Techniques of...

Explain  the Techniques of Surgical Correction ? Techniques of Surgical Correction proximal Dissection (De Bakey type I and IZ or Stanford A) Monitoring lines are insert

Typological species concept, The typological species concept was suggested ...

The typological species concept was suggested by Plato more than 2000 years ago. According to this concept, the immense variety in nature can be reduced to a few "types". Individua

What is oligosaccharides , Oligosaccharides are short chains of m...

Oligosaccharides are short chains of monosaccharides linked together by glycosidic bonds. In case of oligosaccharides  linked to proteins (glycoproteins)  or lipids (glycolipids) o

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