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| one that results in cells that maintain the ability to develop into a complete organism |
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| a solid ball of embryonic cells |
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| when the morula develops a fluid-filled cavity |
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| fluid-filled cavity in morula |
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| integument, the lens of the eye, the retina, and the nervous system |
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| epithelial linings of the digestive and respiratory tracts and parts of the liver, pancreas, thyroid, and bladder lining |
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| circulatory system, excretory system, gonads, connective tissue throughout the body, and portions of digestive and respiratory organs |
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| lines the inside of the shell. It is a moist membrane that permits gas exchange |
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| saclike structure involved in respiration and excretion and contains blood vessels to transport O2, CO2, water, salt, and nitrogen waste |
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| closes the amniotic fluid. The amniotic fluid helps the growing embryo from shock |
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| encloses the yolk. Blood vessels that are in the yolk transfer food to the developing embryo |
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| a series of strong uterine contractions |
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