superior - the part that is above all other parts or towards the head, cell - basic unit of all living things, nucleus - largest component in the cell, blood - body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells. I, excretion - waste such as carbon dioxide ammonia are removed by the diffution, lamina - flat, thin, smooth and green part of the leaf., potassium - maintains the plan turgidity, boron - chemical element with the symbol B and atomic number 5, nickle - chemical element with the symbol Ni and atomic number 2, copper - soft, malleable, and ductile metal with very high thermal and electrical conductivity, epidermis - outermost of the three layers that make up the skin, the inner layers being the dermis and hypodermis, cortex - Organs with well-defined cortical layers include kidneys, adrenal glands, ovaries, the thymus, and portions of the brain, including the cerebral cortex, the best-known of all cortices.,

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