Advanced, Made or caused to make progress., Reproduce, Creates something very similar to something else., Organ, A part of an animal or human that is self-contained and has a specific vital function, such as the heart or liver., Tissue, Any of the types of material of which animals or plants are made., Vessel, A tube or canal holding or transporting blood or other fluids., Flow, Move along or out steadily and continuously in a current or stream., Nutrient, A substance that provides nourishment essential for growth and the maintenance of life., Struggled, Striving to achieve or attain something in the face of difficulty or resistance., Generation, All the people born and living at about the same time, regarded collectively., Breakthrough, A sudden, dramatic , and important discovery or development., Behave, Act or conduct oneself in a specified way, especially towards others., Function, Work or operate in a proper or particular way., Therapy, Treatment intended to relieve or heal a disorder., Transplant, A surgical operation in which an organ or tissue is taken out and replaced.

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