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

Pathogenesis, The interactions between the human host and selected microorg...

The interactions between the human host and selected microorganisms that culminate in IE involve the vascular endothelium, hemostatic mechanisms, the host immune system, gross anat

Important Value Index (IVI) calculation, How can we calculate the IVI from ...

How can we calculate the IVI from a total number of (30) quadrats (each 30 x 30 m quadrats)

Target organ damage and complications, High blood pressure makes your heart...

High blood pressure makes your heart work harder and, over time, can damage blood vessels throughout your body. If the blood vessels in your kidneys are damaged, they may stop remo

Composition-atmosphere, Composition The present day composition of atmo...

Composition The present day composition of atmosphere is the product of a lengthy evolutionary process that began more than four billion years ago. It is composed of a mixture

Kingdom protists, phyla of animal like protists that have free living membe...

phyla of animal like protists that have free living members

Filariasis, Filariasis Filariasis is a chronic infection caused by filarid...

Filariasis Filariasis is a chronic infection caused by filarid worms. Around 10 species of Filaridae family are parasitic to man. Adult worms live in the tissues or body cavities

Explain about central nervous system, Central Nervous System (CNS) Cove...

Central Nervous System (CNS) Covering of the brain and spinal cord is called Meanings (membranes which cover and protect brain and spinal cord are called meanings) There is flu

Explain changes in body tissue compartments - underweight, Explain the Chan...

Explain the Changes in Body Tissue Compartments - Underweight? The severity of nutritional deprivation determines the extent of changes in the body tissue compartments. The fir

Antonmy, bone modeling may occur?

bone modeling may occur?

How much fats should be taken for management of obesity, How much Fats shou...

How much Fats should be taken for management of obesity? Fats, being a concentrated source of energy need to be restricted. Excess dietary fat promotes much more weight gain th

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