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 defensive proteins - biological functions of proteins, Define Defens...

Define Defensive Proteins - Biological Functions of Proteins? These proteins protect in opposition to diseases. Antibodies are the instance of defensive proteins. These combat

Explain systemic circulation in human biology, Explain Systemic Circulation...

Explain Systemic Circulation in human biology? In systemic circulation, oxygenated blood is pumped from the left atrium through the bicuspid valve, into the left ventricle, and

State in brief about the comprehensive neuropsychology, State in brief abou...

State in brief about the Comprehensive neuropsychology Comprehensive neuropsychology testing needs a combination of Context related ideometric and quantitative psychometric app

Wildlife - ecology, Wildlife - Ecology The term wildlife probably orig...

Wildlife - Ecology The term wildlife probably originated in 1913 in a book, Our Vanishing Wildlife by William Hornaday, Director of the New York Zoological Park. The main focu

Define transport proteins in plasma, Define Transport Proteins in Plasma? ...

Define Transport Proteins in Plasma? Transport proteins, embedded in lipid membranes, make easy the import of nutrients into cells or the release of toxic products into the sur

Wbc.., Ask question #Minimuwwm 100 words accepted#

Ask question #Minimuwwm 100 words accepted#

What are the genotype and phenotype, For Dalmation dog, the spotted conditi...

For Dalmation dog, the spotted condition is dominant to non-spotted. a) Using a Punnet square, show a cross between two heterozygous parents. b) A spotted female Dalmation dog is m

Write the meaning of gestational diabetes mellitus, Q. Write the meaning of...

Q. Write the meaning of Gestational Diabetes Mellitus? Gestational Diabetes Mellitus (GDM) is defined as glucose intolerance of any severity that has its onset or is first reco

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