Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Nervous System of Echinoderms
Previous to studying the nervous system of echinoderms, you have to bear in mind the peculiar organization of these animals. Here as well, the nervous system is primitive, retaining the nature of the network pattern below the surface epithelium. The epithelium itself is strewn with sensory cells. Though, the network is, concentrated into ganglionated nerve cords. These retain the common radiate pattern of the group. You will see three systems here:
(i) The oral or the ectoneural system under the oral epidermis, made up of a ring around the oesophagus and a ganglionated strand extending from this ring along - each arm. Every cord is made up of tracts of fibers. This is the main system in most echinoderms.
(ii) The deeper Hyponeural system and
(iii) The aboral or apical system are much weak but organized on the same pattern as the, ectoneural system. So it is simple in structure and with close relationship with the epidermis, lacking ganglia or brain. Though, it has gone through certain amount of concentration, with circular and longitudinal cords. This marks the starting of a central nervous system.
What are the biological troubles that molluscs face due to their soft body? Because molluscs have a soft body they are more fragile. They also have more complexity to support t
Q. What are anticoagulants? What are the practical applications of anticoagulants, like heparin, in Medicine? Ordinarily there are anticoagulants circulating in the plasma sinc
Adult (Post natal) stem cells : act as repair system for the body replenishing specialized cells but also maintain the normal turnover of regenerative organs such as blood, skin o
Q. Nature of disease? Education is very important for diabetics because it is a lifelong disorder. In order to enable the patient to lead a healthy and a good quality Life free
how do we write a limerick spell?
Research and Documentation - Conservation of wildlife First, list of endangered species are established by various national and international agencies. Another important actio
How does the synthetic theory of evolution incorporate knowledge from Genetics and Molecular Biology into the darwinism? Today it is known as that variation of inherited charac
Pseudorabies Pseudorabies is a viral disease caused by pseudorabies virus (PRV) that is classified under family Herpesviridae. This disease is also known as “Aujeszky’s diseas
Q. How are the male gametes and the male gametophytes formed in angiosperms? In the anthers of every stamen there are pollen sacs. Inside the pollen sacs there are microspore m
Define the Structure of D and L isomerism? The prefix D or L are used to refer to the configuration of the carbon next to the primary alcoholic group or in other words, the con
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd