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41. What is the number of sperms which are ejaculated by the man during one mating into vagina of the woman ?

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42. Define insemination

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43. Why cannot more than one sperm cell fertilize one ovum ?

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44. Draw a labelled diagram of a Graafian follicle?

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Leydig’s cells are cells present in intestitial spaces in the region outside the seminiferous tubules.

Function: Leydig’s cells synthesise and secrete male sex hormones testosterone (androgens).

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46. Describe the structure of a seminiferous tubule.

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47. Why scrotal sacs are present outside the body ?

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48. Give the hormonal control of male reproductive system.
Or
Describe the role of hormones in the process of spermatogenesis.

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49. Differentiate between vasa deferentia and vasa efferentia.

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50. Differentiate between seminiferous tubules and Leydig cells.

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