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!
Coxal Glands
There is a pair of coxal glands, in almost all the segments in Onychophora (Peripatus). Developmentally; in every segment a hollow follicle or somite arises and in the trunk region, they become divided in dorsal and ventrolateral portions. The ventrolateral portion grows into the appendages and its cavity makes the end sac of the coxal gland. The end sac opens by a ciliated canal, the coelomostome, into acoiled excretory canal. The terminal portion of the canal is enlarged to form a vesicle or bladder. So the coxal glands are derived from coelomoducts. In arthropods there is a likeness in the formation of coxal glands from coelomoducts and the creation of gonads and their ducts.
In crustaceans they are found in third and sixth segments and they are suitably. named depending upon the site of their opening to outside. The one located at the base of the third segment opens at the base of the antenna, therefore called antennal gland. The one located in the sixth segment opens at the base of the second maxilla, and is termed as maxillary gland. Antennal gland is present in the larval forms of Ostracoda, Copepoda, Branchiopoda, Branchiura, Cirripedia and lower Malacostraca but TP the adults of these groups have maxillary glands. The adult amphipod and decapod crustaceans comprise antennal glands. Mysidacea, a primitive group of crustaceans have both of the antennal and maxillary glands functional. Most arachnids have a pair of coxal glands opening in the sixth segment, opening at the base of third pair of walking legs. In Limulus, there are four pairs of coxal glands.
Dispersal of Seeds A plant usually bears many fruits and innumerable seeds. If all the seeds produced by a plant were to germinate in the immediate vicinity, this will have s
why can only one kind of cellulose be formed?
Explain the periodic table of the elements ? Periodic Table of the Elements : An element is a pure substance composed of atoms all of a single kind. It cannot be broken down
Vivipary - Development Biology In flowering plants the seed or fruit generally is dispersed and germination occurs when the conditions are congenial for growth. However, in so
how many atoms are H2SO4 compound
Q. What are the target organs upon which glucagon and insulin act? Glucagon mainly acts upon the liver and Insulin acts generally upon all cells. Both also act upon the adipose
What are the symptoms of diabetes Healthy Person P takes a drug that produces a strong effect on the epithelial cells of the kidney collecting duct within one hour and lasts f
The AV node of a mammalian heart is destroyed. A. A depolarization in a cell in the left atrium will cause a depolarization of a cell in the left ventricle. B. The contracti
Explain the Management of Furcal Perforation 1 st isolate the perforation site. If the perforation is mechanical accidentally occurred: a- It is probably
Q. Define Diabetic Ketoacidosis? Diabetic Ketoacidosis (DKA) is one of the acute complications of diabetes mellitus. The name itself implies that there is acidosis (decrease 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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd