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From puberty ( age roughly 8 - 15 ) until the menopause (age roughly 45 - 55 years), the female reproductive system normally goes through a series of regular changes which are called the menstruan cycle, because it is repeated month after month.
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www.biotopics.co.uk/human2/reprsy.html
www.biotopics.co.uk/human2/reprsy.html
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Human reproduction employs internal fertilization, and depends on the integrated action of hormones, the nervous system, and the reproductive system. Gonads are sex organs that produce gametes. Male gonads are the testes, which produce sperm and male sex hormones.
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www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookREPRO...
www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookREPROD.html
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Reproductive system - Wikipedia, the free encyclopedia
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The reproductive system is a system of organs within an organism which work together for the purpose of reproduction. Many non-living substances such as fluids, hormones, and pheromones are also imp...
en.wikipedia.org/wiki/Reproductive_system
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A discussion of the human male and female reproductive systems follows. ... The male reproductive system is illustrated to the right. Sperm are produced in the testes located in the scrotum. Normal body temperature is too hot thus is lethal to sperm so the testes are outside of the abdominal cavity where the temperature...
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biology.clc.uc.edu/courses/bio105/reproduc.htm
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1. The Feminine Cycle ... 2. The Man's Contribution ... 3. The Fertilisation...
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www.paternityangel.com/Articles_zone/How_it_happens/Fem...
www.paternityangel.com/Articles_zone/How_it_happens/FemaleDiagram.htm
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This problem set is designed to help students understand the human reproductive system. It covers such topics as the anatomy of the male and female reproductive systems, the hormones that influence these systems, fertilization, sterilization, and transmission of HIV.
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www.biology.arizona.edu/human_bio/problem_sets/Human_Re...
www.biology.arizona.edu/human_bio/problem_sets/Human_Reproduction/human_reproduction.html
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In the human reproductive process, two kinds of sex cells, or gametes (pronounced: gah-meetz), are involved. The male gamete, or sperm, and the female gamete, the egg or ovum, meet in the female's reproductive system to create a new individual.
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kidshealth.org/teen/sexual_health/guys/male_repro.html
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