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Classroom visuals
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![Fertilisation]()
Fertilisation
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![IVF Treatment]()
IVF Treatment
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![Sperm]()
Sperm
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![Human Foetus Inside Womb]()
Human Foetus Inside Womb
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![Human Embryo]()
Human Embryo
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![Human Embryo At 6 Weeks' Gestation]()
Human Embryo At 6 Weeks' Gestation
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![Mitosis]()
Mitosis
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![Cancer Cell]()
Cancer Cell
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![Plant Cells]()
Plant Cells
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![Epidermis]()
Epidermis
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![Blood Cells]()
Blood Cells
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![Chromosomes]()
Chromosomes
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![Sperm Cell]()
Sperm Cell
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![Identical Twins]()
Identical Twins
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![Protein Synthesis]()
Protein Synthesis
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![Pea Seeds]()
Pea Seeds
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Male Reproductive System (labelled)
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Male Reproductive System (unlabelled)
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Female Reproductive System (labelled)
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Female Reproductive System (unlabelled)
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Meiosis
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Meiosis (unlabelled)
Film info
Film summary
99% of sperm die before they reach the egg. What challenges face the sperm as they journey from the testes to fertilise the egg?Key facts
- From puberty onwards, the testis produce 15,000 sperm per second.
- Sperm is ejaculated into the vagina in a seminal fluid called semen.
- Sperm must swim 10cm to reach the egg, and most are killed on the journey.
- Only one sperm will eventually make its way to the centre of the egg
Transcript
Sperm. From puberty onwards the testis produce 1500 per second.
Each one lives for 72 days, and over the first three weeks it develops the ability to swim.
Sperm are ejaculated into the vagina mixed with a seminal fluid. Together these are known as semen.
Semen contains alkaline substances to combat the acid ...
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