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!
Metameric segment - Segmentation
On the other hand true metameric segment as best observed in annelids has separate schizocoelic body cavity of mesodermal origin in each segment. Individual segments are budded off in linear sequence from a proliferation region just in front of the posterior end. Segmented animals have a specialized anterior acron (prostomium) and posterior pygidium or telson both of which are not segments. In between there are a varying number of segments.
In near perfect segmentation, appendages, musculature, ganglion, nerves, blood vessels, coelom and all body organs are replicated in each segment. This arrangement is best seen in annelids. In chordates, segmentation is usually apparent in the axial skeleton. Muscles and nerves. Why did segmentation evolve in animal groups? What advantages does it confer on the animals in which it is seen? Let us examine this a little closely. The most important advantage is that segmentation divides a body into a series of compartments, each of which can be regulated almost independently. This in a way provided the framework for specialization. In colonial animals this specialization is seen in polymorphism of zooids while in segmented animals regional specialization of segments occurs.
Of which main compounds is the mitochondrion structure made? Mitochondria are organelles delimited by two lipid membranes. The inner membrane invaginates to the interior of the
Of which type of tissue are cartilages and bones made? Are the cells of the connective tissue far or near to the others? The relative great spacing among cells is a typical
What is the clinical manifestation of the disease known as daltonism? An X-linked daltonism is a disease in which the affected individual sees the red color as green or confoun
PHYSIOLOG Y OF RESPIRATION - 1 . EXCHANGE OF GASES - It is Haemotasis. It takes place in Alveoli between alveolar air and arterial cappilary by diffusion i.e., f
What is the difference between spermatocyte I and spermatocyte II? The spermatocyte I (2n) undergoes the primary division of meiosis (meiosis I) originating two spermatocyte II
Primitive Nervous System - Nerve Net A nervous system creates its appearance for the first time in the phylogeny among Cnidaria. In this group the nerve cells make an irregula
Why in inflammatory and infectious conditions may clinical signs related to the lymphatic system occur? The lymph nodes, or lymph glands, have lymphoid tissue that makes lympho
Q. Since among the 64 codons of mRNA 61 codify amino acids that form polypeptide chains what are the functions of the three remaining codons? Since there are 20 amino acids and
Explain Acute Renal failure Acute Renal failure: Renal failure associated with burns or other trauma or with sharp infection or obstruction of the urinary tract.
What is the effect of physical activity on health? The Surgeon General's report (1996) summarizes the effects of physical activity on health as follows. Overall Mortality: H
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