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!
Testis of Non-Mammalian Vertebrates
The testis of non-mammalian vertebrates is also made up of tubules. The tubules contairi nest of cells which undergo spermatogenesis asynchronously. Each nest of cells is called, a cyst, which contains germ cells of the same stage of differentiation. For example in a tubule there may be cysts of spermatogonia, primary spermatocytes, secondary spermatocytes, spermatids and spermatozoa. In the breeding season testis lobules contain maximum number of cysts of spermatozoa and also the spermatozoa released into the lumen of the tubule. During the non-breeding season there are more number of cysts of spermatogonia and spermatocytes. You have studied earlier in this section that in mammalian testis the interspaces between the seminiferous tubules is occupied by Leydig cells. In the testis of non-mammalian vertebrates the interspaces between the tubules is occupied by the lobule boundary cells; These are homologous to the Leydig cells and apparently have the same endocrine function.
Figure : Testis of Non-Mammalian Vertebrates
Industrial Effluents - Causes of Water Pollution Most industrial operations produce effluents that are discharged into nearby river or any other water body. The industrial eff
TYPE S OF BONE - On the basis of its texture , a bone is of two types - Spongy or cancellous or tubercular bone and Compact or periosteal or dense bone.
Determination of Vitamin A Vitamin A assay is carried out by chemical method. This method is called Carr Price Reaction. Vitamin A and the carotenoids produce an intense b
Define Carcinogenic - Non-dietary Factors? A large number of agents cause genetic damage and induce neoplastic transformation of cells, they fall into the following categories.
Define Vitamin A, Iron and Zinc required for elderly? Vitamin A, Iron and Zinc: The recommendation for iron is said to decrease in elderly women. Intake of vitamin E and zinc
Q. Which are the most important inorganic molecular substances for living beings? Ans. The most important inorganic substances for living beings are mineral salts, water,
Q. Treatment and Management of Diarrhoea? You must have realized by now that diarrhoea should not be neglected and must receive prompt medical care to minimize the frequency of
In the last unit we traced the human evolutionary history mostly from a palaeontological viewpoint. Although still fragmentary, the available fossil evidence makes it possible to c
Q. Provision of Additional Tooth Support? Transitioning a patient from a complete denture to an implant supported fixed prosthesis have resulted in a dramatic improvement in th
Q. Can you explain Yersinia Enterocolitica Gastroenteritis? Yersiniosis is an infectious disease caused by a bacterium of the genus Yersinia. Most human illness is caus
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