| 31. | So yes, two sperm cells are transported inside another cell.
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| 32. | Fertilization takes place when a sperm cell meets an ovum.
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| 33. | Sertoli cells function to nourish the developing sperm cells.
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| 34. | And then there is the strange idea of growing human sperm cells in another species.
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| 35. | The smaller gamete is the sperm cell and is produced by males of the species.
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| 36. | And of course there are gazillions of sperm cells in a given " batch ".
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| 37. | Each ejaculate contains 3-10 million sperm cells or so.
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| 38. | Once the sperm cells find their way past the zona pellucida, the cortical reaction occurs.
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| 39. | Normally, each egg and sperm cell contains 23 chromosomes.
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| 40. | In between the Sertoli cells are spermatogenic cells, which differentiate through meiosis to sperm cells.
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