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!
Locomotion in Echinodermata
Locomotion in echinoderms is accomplished through a unique canalicular system which is termed as the water-vascular system. This system is characteristic of echinoderms, in most of that it is quite well developed. It consists of a series of canals derived from the coelom. The canals consist of a fluid. Sea water has free access to the system via a perforated sieve plate called the madreporite on the aboral side of the animal. The fluid is much more like seawater but has a high content of potassium ions. Some proteins and several types of amoebocytes float in it. The structural organisation of the water-vascular system is chiefly the same in all echinoderms, though deviations from the basic plan occur. To study the components of the system, we might take the water-vascular system of the star-fish, as typical example. Its main component applicable from the point of view of locomotion consists of a pentagonal circumoral vessel that is termed as the ambulacral ring canal. From the ring canal are given off five radial vessels. Every radial canal extends up to the tip of the arm. It gives off a large number of side vessels along its course. Each side vessel leads into a tube-foot or podium, which is a hollow conical or cylindrical process with an ampulla and a terminal sucker. A Valve is present at the junction of lateral vessel with the tube-foot.
S p e c i a l Uses Biogas Biogas is an important renewable energy resource for rural areas. Generation of bio-gas from dung and urine is a very simple and cost-effective
Density Dependent Factors - Population Regulation The density dependent factors are intrinsic or biotic factors and they depend on interactions between individuals within same
Q. What is myoglobin? What is the function of this molecule in the muscle tissue? Myoglobin is a present in muscle pigment and fibers similar to hemoglobin. Myoglobin has a gre
Tunnel Subvalvar Stenosis : This variety is less common and extends from sub aortic area for a variable length of 10-30 mms (tunnel stenosis). In the severe variety, the tun
Why in some cases is mitosis a synonym of reproduction? In some living beings asexual reproduction happens by many means: binary division, schizogony, budding, grafting, etc. I
How do we Treat Protein Energy Malnutrition? Major objective of the treatment of PEM is to provide adequate energy and protein intake and control infections, if any. Mild and m
Define colonization of the gut - probiotic effect? It is not clear how probiotics influence the flora and produce a beneficial effect. However, colonization of the gut appears
Define Functions of Inorganic Phosphorus? The major functions of inorganic phosphorus include: a) Structural component of bones and teeth: Phosphorus is a part of calcium ph
The vertebral bodies are much larger in the lower back than the neck. What is the functional significance of this structural difference?
Q. What is the energy source used in active transport through biological membranes? The energy necessary for active transport against the concentration gradient of the transpor
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