The development of an embryo is a very unique and odd process when you really think about it. Two essentially halves of a cell come together to form a full cell with a full genome. This cell continues to divide, and along the way, these cells begin to differentiate and form different parts of the larger oganism that is being created. It's strange to think that cells that have organelles to regulate themselves and take care of themselves work together to form a greater being. They stop functioning for their own sake and begin to function for the survival and wellbeing of the larger organism it is a part of. Organs and different types of tissue are created, and these cells communicate using hormones and other cell signaling ligands. Eventually, a full human is formed that will continue to grow and develop outside of the womb.
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