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3. SKELETAL MUSCLE FIBERS ARE CYLINDRICAL, MULTINUCLEATED, STRIATED, AND UNDER VOLUNTARY CONTROL. SMOOTH MUSCLE CELLS ARE SPINDLE SHAPED, HAVE A SINGLE, CENTRALLY LOCATED NUCLEUS, AND LACK STRIATIONS. THEY ARE CALLED INVOLUNTARY MUSCLES.
4. RED BLOOD CELLS CARRY OXYGEN FROM OUR LUNGS TO THE REST OF OUR BODIES. THEN THEY MAKE THE RETURN TRIP, TAKING CARBON DIOXIDE BACK TO OUR LUNGS TO BE EXHALED.
5. CELL, IN BIOLOGY, THE BASIC MEMBRANE-BOUND UNIT THAT CONTAINS THE FUNDAMENTAL MOLECULES OF LIFE AND OF WHICH ALL LIVING THINGS ARE COMPOSED. ... THESE CELLS COOPERATE WITH OTHER SPECIALIZED CELLS AND BECOME THE BUILDING BLOCKS OF LARGE MULTICELLULAR ORGANISMS, SUCH AS HUMANS AND OTHER ANIMALS.
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Marginal utility refers to additional utility which a consumer gets on consuming one extra unit of a commodity. So, as consumer consumes more and more of a commodity, the satisfaction at each level will diminish, which is represented by a downward sloping curve
The main function of RBCs is to transport oxygen from the lungs to the tissues, where it is used as a source of electrons and ATP synthesis in the mitochondria.
the smallest structural and functional unit of an organism, which is typically microscopic and consists of cytoplasm and a nucleus enclosed in a membrane.