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11. What are the major functions of male accessory ducts and glands?

Male accessory ducts include vasa efferentia, epididymis. vas deferens and rete testis. THey transport and temporarily store spermatozoa. Male accessory glands include seminal vesicle, bulbourethral gland and prostate gland. These glands secrete fluids that lubricate the female reproductive system and sperms.  

10. What are the major components of seminal plasma?

The major components of seminal plasma are mucous, fructose, calcium, ascorbic acid, certain enzymes and some secretions of accessory glands.  

9. Draw a labelled diagram of sperm.

Labelled diagram of human sperm is as follows:  

8. Define spermiogenesis and spermiation.

Spermiogenesis- The spermatids are transformed into spermatozoa by the process called spermiogenesis. Spermiation- The release of sperms from the seminiferous tubules occurs through a process called spermiation. 

Q7.     Name the hormones involved in regulation of spermatogenesis.

  Spermatogenesis initiated due to an increase in the secretion of gonadotropin-releasing hormone by the hypothalamus. Increase in GnRH act on anterior pituitary and stimulate secretion of two gonadotropins, LH (luteinizing hormone) and FSH (follicular stimulating hormone). Among these, LH acts on Leydig cells and stimulates them to secrete androgens whereas FSH acts on Sertoli cells and...

 6 What is spermatogenesis? Briefly describe the process of spermatogenesis.

Spermatogenesis- It is the process of formation of spermatozoa from spermatogonia in testes at the time of puberty is called spermatogenesis. In this process, the spermatogonia present at the inner side of seminiferous tubules multiply by mitotic division and increase in number. Each spermatogonium contains 46 chromosomes. Spermatogonia forms spermatocyte that undergoes meiotic division to...

5. Describe the structure of a seminiferous tubule.

Seminiferous tubules are highly coiled structures present in testicular lobules. The seminiferous tubules are lined by two types of cells i.e. spermatogonia and sertoli cells from inside. Spermatogonia are the male germ cells that form sperms through meiotic divisions followed by mitotic division, while Sertoli cells provide nutrition to the germ cells. The regions outside the seminiferous...

4. Write two major functions each of testis and ovary.

Functions of testis 1. Testis produces spermatozoa which are male gametes.  2. In testis, the male sex hormone testosterone is developed. Functions of ovary 1. The ovary produces ovum by the process oogenesis. 2. Graffian follicles in ovary produce female sex hormone called estrogen. 

3. Draw a labelled diagram of female reproductive system.

Female reproductive system 

2. Draw a labelled diagram of male reproductive system.

Labelled diagram of the male reproductive system is as follows:   

1.     Fill in the blanks:
                    (a) Humans reproduce _____________ (asexually/sexually)
                    (b) Humans are _____________ (oviparous, viviparous, ovoviviparous)
                    (c) Fertilisation is _____________ in humans (external/internal)
                    (d) Male and female gametes are _____________ (diploid/haploid)
                    (e) Zygote is _____________ (diploid/haploid)                                                                                                           

                    (f) The process of release of ovum from a mature follicle is called _____________
                    (g) Ovulation is induced by a hormone called _____________
                    (h) The fusion of male and female gametes is called _____________
                    (i) Fertilisation takes place in _____________
                    (j) Zygote divides to form _____________which is implanted in uterus.
                    (k) The structure which provides vascular connection between foetus and uterus is called    _____________

                   (a) Humans reproduce sexually                     (b) Humans are viviparous                      (c) Fertilisation is internal in humans                     (d) Male and female gametes are haploid                     (e) Zygote is diploid                                                                                                                                (f) The...
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