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
Q. How has the importance of the brain evolved from fishes to reptiles? From the least to the most complex brain structure, it is evident that the brain, from fishes to beings
What is the structural flat representation of an amino acid molecule? An amino acid has a central carbon to which a carboxyl group binds on a side and to which a -R (variable r
Explain the Composition of Blood Agar? Infusion from beef heart - 500 gm Tryptose - 10.0 gm Sodium Chloride - 5.0 gm Agar - 15 gm Distilled water - 1000 ml pH
What is the stage of the cardiac cycle during which the ventricles are filled? The filling of the ventricles with blood happens during diastole. The Circulatory System - Ima
Q. Conditions required for Mimicking Pericardial Effusion? In 2DE few conditions can mimic PE. a) Pericardial fat-Mostly localized anteriorly. Absence of fat in the posterio
Reptiles - Regeneration in Vertebrates Among reptiles, the lizards like the Gecko Hemidactylus flaviviridis and Anolis carolinensis can again generate their tail, following au
What is Dynamic Auscultation in heart surgery? It involves determining the effects on heart sounds and murmurs of various physiological and pharmacological manoeuvres, which al
What is the difference between heterozygosity and homozygosity? The Homozygosity occurs when an individual has two identical alleles of a gene, for instance, AA or aa. The Het
lichens
#question.name any two plants having heterotrophic mode of nutrition .
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