Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number

022-62211530

Mon to Sat - 11 AM to 8 PM

what r alimentary canal,triploblastic,bilaterally symmetrical triploblastic,dorsal nerve cord ?

Asked by aayushibansal1993 14th August 2008, 7:27 PM
Answered by Expert
Answer:

Alimentary canal is also called digestive tract. It is the passage through which food passes, starting at the mouth and ending at the anus. It includes the mouth, pharynx, oesophagus, stomach, small intestine and large intestine. Alimentary canal is involved in consuming food, digesting it, and expels the waste products.

When the body can be divided into 2 symmetrical halves by only one longitudinal plane passing through the axis, the symmetry is called bilateral symmetry. In other words,  it is the symmetrical arrangement, as of an organism or a body part, along a central axis, so that the body is divided into equivalent right and left halves by only one plane.

Triploblastic refers to a complex level of tissue organization, consisting of three embryological layers i.e. ectoderm, endoderm and mesoderm.

Dorsal nerve cord is a hollow cord dorsal to the notochord, made up of a bundle of nerve fibers. It runs down the back and connects the brain with the lateral muscles and other organs. It is is one of the embryonic features unique to chordates. It is formed from a part of the ectoderm. It is later modified into the brain and spinal cord.

Answered by Expert 14th August 2008, 7:44 PM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!

Chat with us on WhatsApp