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InterviewSolution
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Answer the following questions: (A) Given below is the T.S. of human ovary. Identify the following in the diagram:(i) Corpus luteum (ii) Secondary oocyte (iii) Antrum (iv) Primary follicle (v) Blood vessels(B). Explain the changes the primary oocyte undergoes while in different follicular stages before ovulation. |
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Answer» (A) (i) Corpus luteum—d (ii) Secondary oocyte—c (iii) Antrum—b (iv) Primary follicle—e (v) Blood vessels—a (B) Changes in the primary oocyte: ● Each primary oocyte gets surrounded by a single layer of granulosa cells and is known as primary follicle. ● Primary follicle get surrounded by more layers of granulosa cells and a new theca and form secondary follicle. ● A secondary follicle transforms into tertiary follicle characterised by a fluid-filled space, the antrum. ● Primary oocyte undergoes first meiotic division and produces two unequal haploid cells—a large haploid secondary oocyte and a tiny first polar body. ● The tertiary follicle further changes into the mature Graafian follicle. ● The secondary oocyte forms a new membrane called zona pellucida around it. |
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