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!
Coelomoducts of Molluscs
In Molluscs, like in Crustacea nephridia are absent. But certain of the larval pulmonates do possess protonephridia suggesting that they have been secondarily lost in molluscs. The excretory system is much more or less similar in all the groups of molluscs. In molluscs it is assumed that the two coelomic cavities meet dorsally to enclose the heart and their walls proliferate into germ cells. Their cavities through further differentiation give rise to gonad anteriorly, pericardial canal centrally and gonoduct posteriorly. The final segment, in addition had an excretory function. In Aplacophora the coelomoducts of adults contain a pair of tubular structures, leading from the coelomic cavity to the outside and primitively constitute the genital ducts. But in other molluscs modifications have arisen in the subsequent lines:
i) There is a separation of genital and excretory organs.
ii) There is the development of fixed degree of asymmetry.
Selective Destruction - Wildlife The selective destruction of one species of an existing fauna can produce equally unfortunate results. The perfect demonstration of unexpected
Explain about the Integumentary Tissues? The skin, hair and nails covering and protecting the body are the intengumentary tissues. Depigmentation of hair and wrinkling of skin
Nurse's Role During Phototherapy You should take care of following while nursing the baby in receiving phototherapy. Check the lights of phototherapy unit before use and
Factors Affecting Fertilizer Requirements The rapid increase in the use of fertilizers is based on the fact that large profits are obtained from the money invested in them. The
Indications for Surgery : Once diagnosis of constrictive pericarditis is made and confirmed by chest X-ray, ECG, echocardiogram, CT, MRI scan, cardiac catheterisation and angio,
#question.characteristics of coelenterata?.
Q. Which kind of circulatory system do molluscs have? How can it be compared to the respiratory system of annelids? Molluscs, with the exception of cephalopods, have an open ci
Q. Explain about Rheumatic Heart Disease? Rheumatic Heart Disease (RHD) is a very common cause of cardiovascular disorder in children and adolescents in India. This disease inv
DERMIS (CORIUM) - Mesodermal in origin. More developed part. Leather is obtained from dermis by tanning. Thinnest in eye lid. Connective tissue present. In it 4 types
Q. Enlist the various modalities available for sterility assurance? Various modalities available for sterility assurance are a) Prevention of overloading b) Chemical indi
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