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Watch Crash Course Anatomy & Physiology Season 1 Episode 42 Online

  • 2/10
  • COUNTRIES: United States of America
  • Subtitles: English

After weeks of discussion of human reproduction, today we arrive at the main event: THE SEX. Hank explains the four phases of the human sexual response, how a sperm finds and fertilizes an egg, creating a zygote, and how different types of contraception work to prevent that from happening.