Nervous system of asteroidea, Biology

Nervous System of Asteroidea

The nervous system of steroids is not ganglionated and is closely related with epidermis. It consists mainly of a circumoral nerve ring surrounding the mouth. From this nerve ring radial nerves expand into each arm. The radial nerve supplies branches to the podia and ampullae and is continuous along with the subepidermal nerve net. Sense organs in asteroids are the eye spots found at the tip of the arm. The epidermis has as well sensory cells that probably function like photoreceptors, chemoreceptors and mechanoreceptors. The epidermal sensory cells are much more prevalent on the suckers of tube feet, tentacle like sensory the feet and along the margins of the ambulacral groove.

Posted Date: 2/4/2013 1:21:03 AM | Location : United States







Related Discussions:- Nervous system of asteroidea, Assignment Help, Ask Question on Nervous system of asteroidea, Get Answer, Expert's Help, Nervous system of asteroidea Discussions

Write discussion on Nervous system of asteroidea
Your posts are moderated
Related Questions
Which of the recombination process(transformation, conjugation and transduction) would be most likely to occur in the natural environment?

In meiosis - starting from stage G1 through the completion of meiosis, how much DNA is in each stage/phase when referring to the nucleus of spermatagonia?

Q. Explain Aortic Valvuloplasty? Valvar aortic stenosis accounts for 4-6 per cent of CHD. LV Outflow Tract obstruction eventually leads to LV dysfunction and congestive heart f

Define the Meaning of Isomerism? All monosaccharides exhibit isomerism. An asymmetric carbon or chiral carbon contains four different groups attached to it. The formula 2 n de

Distinguish between epithelial and connective tissues with respect to their cell arrangement? PROVIDE a specific example( for both tissue types) of how the arrangement of cells hel


Describe Pharmacologic Agents in amyl nitrite ? Amyl Nitrite : It produces vasodilatation which initially results in marked fall in BP and in the next 30-60 seconds there is

In Reggie's case, he fractured the proximal end of his right femur, an integral component of his hip. Name the joint disorders that Reggie is more a risk of in (a) the short term a


Q. Which animals make cutaneous respiration? Adult amphibians and Terrestrial annelids make cutaneous respiration in amphibians there is also pulmonary respiration, the thin sk