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| Chemicals released in one part of the body that travel through the bloodstream and affect the activities of cells in other parts of the body. |
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| Cell that has a receptor for a particular hormone. |
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| Gland that releases its secretions through tubelike structures called ducts. |
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| Hormone like modified fatty acid produced by a wide range of cells. |
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| Bean-sized structure that dangles on a slender stalk of tissue at the base of the skull. |
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| Condition that occurs when the pancreas produces too little insulin, resulting in an increase in the level of blood glucose. |
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| Female gonad that produces eggs. |
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| Male reproductive organ that produces sperm. |
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| A period of rapid growth and sexual maturation during which the reproductive system becomes fully functional. |
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| External sac containing the testes. |
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| One of hundreds of tiny tubules in the testes in which sperm are produced. |
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| Structure in which sprem fully mature and are stored. |
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| External male reproductive organ. |
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| Cluster of cells surrounding a single egg. |
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| Cycle during which an egg develops and is released from an ovary and the uterus is prepared to received a fertilized egg. |
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| Name given to a follicle after ovulation because of its yellow color. |
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| Phase of the menstrual cycle during which the lining of the uterus, along with blood and the unfertilized egg, is discharged through the vagina. |
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| Sexually Transmitted Diseases (STD's) |
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| Disease spread from one person to another during sexual contact. |
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| Process in which a blastocyst attaches itself to the wall of the uterus. |
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| Process in which cells become specialized in structure and function. |
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| Process of cell migration by which a third layer of cells is formed within the cavity of a blastocyst. |
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| Development of the nervous system. |
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| Connection between mother and developing embryo. |
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| Name given to a human embryo after eight weeks of development. |
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