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
Q. Waste produced during surgical process? Regular garbage: Regular garbage generated from clerical office procedures or kitchen waste should be disposed of within the usu

Explain about the water-soluble vitamin - Riboflavin? Riboflavin (vitamin B 2 ), a water-soluble vitamin, was discovered in milk as a pigment possessing a yellow green fluore


XYY humans are fertile males. XXX humans are fertile females. What do these observations reveal about the mechanisms of sex determination and dosage compensation?

my question is what is phyletic lineage

Q. Guiding and overseeing actions of Consciousness? Guiding and overseeing actions: Consciousness connects brain and body states with external occurrences. In order to functio

In the human body, the potassium ion can pass easily through cell membranes, yet the potassium ion concentration is higher inside many cells than it is outside these cells. Could t

Chloroplasts are disk-like organelles with the double membrane found in the eukaryotic plant cells; contain thylakoids and are the site of photosynthesis. ATP is generated during

Explain saturated fatty acids Some of the more significant saturated fatty acids with their systematic and common names are listed in table, and some of the unsaturated fatty a

Explain the Microscope? Microscope is a powerful and crucial basic tool in the field of microbiology. Microbiology, as we have already studied in our theory Course, is the scie