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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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45. Where are the Leydig cells present ? What is their role in reproduction ?

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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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Differences between vasa deferentia and vasa efferentia

Vasa deferentia

Vasa efferentia

1. Vas deferentia carries the sperms from epididymis to urethra.

2. It transports mature sperms.

3. Two in number

1. Vasa efferentia transfer sperms from rete-testis to epididymis.

2. It transports immature sperms.

3. Many in number

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50. Differentiate between seminiferous tubules and Leydig cells.

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