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The earth is home to millions of different kinds of organisms, from slime molds to sheep, blue whales to naked mole rats. Yet the diversity of size and structure evident in all of these organisms emerges from one fundamental building block: the cell. A cell is a small, membrane-

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Reproductive SystemMale Reproductive System Testes produve the sperm and the hormones that cause male characteristics. These organ isnfound ia the scrotumScrotum is the pocket of skin where the testes are being cool.Sperm can only develop at temperatures lower than the body temperature. Through out males life, sperms are produced.The testes are connected with tubes called sperm ducts through which the sperm pass out of the males body. In the process of ejaculation, the sperms move through these tubes. Fluids from three glands are secreted and emtied in these tubes.Semen fluids that are mixed with the sperms and passes through urethra. Urethra carries out the semen from the body through the penis.Penis is the external organ of the human male that transfers the sperms into the body of the human female.Female Reproductive System Ovaries found in the lower part of the abdomen of a female. A human female ha two ovaries, each measuring 3.5 cm long and 1.3 cm wide. It produce the hormones that cause the female sex characteristics and produce the egg or the ovum, the female sex cell.Womb or Uterus located between the ovariesHollow pear-shaped organ. It is a muscular organ with thick walls.Once an eggis released from the ovary, it is drwan in to a tube through the uterus. This tube is called oviduct. Thre are two oviducts. Each oviduct is connected to the uterus but not the ovaries. The uterus narrows at the lower end leadin

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