CLASS 12TH EXAM PREPRATION 2ND CHAPTER HUMAN REPRODUCTION
Автор: Agra Wale Teacher's
Загружено: 2025-12-11
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Human reproduction is a complex biological process that involves the fusion of male and female gametes, leading to the development of a new organism.
Overview of Human Reproduction
Human reproduction primarily occurs through sexual reproduction, which involves the combination of genetic material from a male and a female. This process begins with fertilization, where a sperm cell from the male fertilizes an ovum (egg) from the female, resulting in the formation of a zygote. The zygote then undergoes a series of developmental stages, ultimately leading to the birth of a new individual.
Key Stages of Human Reproduction
Gamete Production:
In males, sperm are produced in the testes through a process called spermatogenesis.
In females, eggs (ova) are produced in the ovaries through oogenesis. Each gamete contains half the genetic material (23 chromosomes) necessary for human life.
Fertilization:
During sexual intercourse, sperm are ejaculated into the vagina, where they travel through the cervix and uterus to reach the fallopian tubes.
Fertilization typically occurs in the fallopian tube when a sperm successfully penetrates an ovum, forming a zygote, which contains 46 chromosomes (23 pairs)
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