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!
Malpighian Tubules
Other arthropods like insects and myriapods and arachnids have Malpighian tubules, the outgrowths of alimentary canal like excretory organs. Malpighian tubules are totally new structures, containing no resemblance either to nephridia or coelomoducts. Generally, the Malpighian tubules that are composed of single layered epithelium and are bathed in the blood of haemocoel. By the procedure of active secretion water passes into the lumen of Malpighian tubule together with nitrogenous wastes and dissolved salts. The secretion essentially takes place in the distal parts of the tubules. The proximal part of the tubule as well as the rectum is the sites of absorption. Most of the terrestrial arthropods excrete uric acid. The reabsorption of water results in the precipitation of urate crystals as nitrogenous waste, therefore the animals are termed as uricotelic. Peripatus which is also terrestrial lacks Malpighian tubules. Nevertheless it is uricotelic. The excretion of uric acid is acquired from the intestinal epithelium into the intestinal lumen. It is removed from the intestine within a peritrophic membrane which is sloughed off every 24 hours. There are also segmentally arranged coelomic excretory organs. The coelomoducts of Peripatus can be considered as vestigial organs of its aquatic ancestry, with a much reduced activity.
Which of the following pairs of events in a human female occur at, or nearly at, the similar time during the menstrual cycle? A. High blood plasma LH levels and ovulation. B
Q. Concerning the number of hosts how are parasites classified? The Parasites that require only one host are called as monoxenous parasites. The Parasites that need more than o
Explain the Structure and Functions of Kidney You would have got a clear idea as to where the kidneys are situated. Yes, the kidneys are located in the posterior part of the ab
Mention causes of implant failure due to restorative problems. 1) Restorative problems: a) Excessive cantilever. b) Use of implants with rigid prosthetic connection with
Symptoms refer to the problems expressed by the patients. Signs are obtained by a health professional from the patients by interacting with him, by conducting tests, etc. The sympt
Why is the uricotelic excretion essential for avian and reptile embryos? In reptiles and birds the excretory system is uricotelic as uric acid is insoluble, less toxic and sui
Body Fluids of Marine Teleost The body fluids of marine teleost are hypotonic to seawater, so these fishes lose water to the environment especially across the gill epithelium.
Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4
Concerning permeability what type of membrane is the cell membrane? The cell membrane is a selectively permeable membrane, i.e., it permits the passage of water and some select
EFFECT OF ALCOHOL - 1 . EFFECT ON NERVOUS SYSTEM - Alcohol has an anesthetic effect on nervous system. It affects orientation, alertness, coordination, judgement
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