--%>
Assignment Help - homework help

Characterization of nervous system-phylum Annelida

How is nervous system characterized in beings of phylum Annelida? How can one compare cephalization in the annelids to cephalization in platyhelminthes and nematodes?

E

Expert

Verified

Annelids contain a nervous system made up of two ventral chords and one comparatively big nervous cell concentration in its anterior part resembling a primitive brain.

Nematodes contain an anterior neural ring joined to two neural chords, a ventral and a dorsal one, whereas in planarias (or platyhelminthes) there are just two small anterior “cerebral” ganglia from which neural chords divide. Cephalization in annelids therefore is more outstanding than in nematodes or in the flatworms.

   Related Questions in Biology

  • Q : What is an Inventory Control Inventory

    Inventory Control: It is the process of adopting procedures to restrict the total cost of inventory. Control procedures comprise balancing requests against funds that are accessible for items or products in inventory, purging store-rooms of stock that

    		•
  • Q : Harassment - Barriers to Diversity -

    Consciously shinning or verbally or physically abusing an individual because of membership of a particular group.

    		•
  • Q : Double and simple closed circulation

    Explain about the double and simple closed circulation?

    		•
  • Q : Mutualist exploration of the cellulose

    What do you mean by “mutualist exploration of the cellulose digestion”, a phenomenon which takes place in some insects and mammals?

    		•
  • Q : Classification of the class Reptilia

    Classify the class Reptilia concerning the maintenance of the body temperature?

    		•
  • Q : Describe Network Administration Network

    Network Administration: It involves a broad array of operational tasks which help a network to run proficiently and smoothly. Devoid of network administration, it would be hard for all however the smallest networks to sustain network operations.

    		•
  • Q : Define Operating Leadership Operating

    Operating Leadership: It identifies key risk factors which affect individual and team performance. This has been specifically designed to give the National Park Service with a standardized approach which will aid employees in assessing and managing ri

    		•
  • Q : Ingredients/Element of Communication -

    1)     Source:  the source is the originator of the idea or the message. It may also be known as the sender who may be an individual or a group though, ultimately, it is an individual who might be acting the role on behalf of a group. The source conceives

    		•
  • Q : Which arthropod group is the most

    Which arthropod group is the most diversified animal group of the planet? How can this evolutionary achievement be described?

    		•
  • Q : Conflict - Organizational Behavior

    Meaning and definition The concept of conflict, being an outcome of behaviors, is an integral part of human life. Wherever there is interaction, there is conflict. Conflict can be defined in many ways and can be considered as an expression of hostility, negative attitudes

    		•