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!
Cephalisation - Metazoa
Bilateral animals when creeping or swimming, have a tendency to keep the same end of the body forward and the same surface down towards the substratum. In such a case the sensory organs and nervous system would also have a tendency to be concentrated at the anterior end. This differentiation of a 'head end' is known as cephalisation'(literal1y head development). Cephalisation has evolved to various degrees in bilateral animals.
Figure: Concentration of nervous system in anterior region of a) liver fluke b) Tapeworm c) Planaria
The mouth is usually located at the leading end with which become associated the organs for food capture, as the sensory organs on the head can detect food. Neurons become organized into brain in this region for rapid coordination; longitudinal nerve cords are developed for rapid transmission of information throughout the length of the body. Cephalisation in its most primitive form can be seen in Platyhelminthes.
TEST TUBE BABY - Ova are fertilized in laboratory dish (in vitra) containing a nutrient broth . It may be artificial insemination donor (AID) / Artificial insemination h
Define Streptomycin Streptomycin causes ototoxicity (usually vestibular disturbance) and, less frequently, renal toxicity. Amikacin and kanamycin commonly cause tinnitus an
What is Enzyme assay Enzyme assay may also be used to determine whether stored plant products are suitable for use as food commodities, for e.g. α-amylase should be present
Define Spiral cleavage in brief. Pattern of cell division in the developing embryo where products of the cell divisions shift by rotating either counterclockwise or clockwise s
Membrane-bound organelles are absent in : 1. Saccharomyces 2. Streptococcus 3. Chlamydomonas 4. Plasmodium Streptococcus
what type of body cavities present
respiration & its types
Describe about Aorto Pulmonary Window ? This uncommon malformation consists of communication usually non-restrictive between the adjacent walls of the ascending aorta and pulmo
Explain Adverse effects of Stavudine Fatal lactic acidosis may happen more frequently with stavudine than with other NRTIs. Serum aminotransferase activity may enhance with sta
OBJECTIVES : After reading surgery, you will be able to: 1 understand the fundamental of closed and open heart surgery and recent developments in off pump surgery; 2 in
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd