Which sentence best describes the organization of the heart. Available choices: I. The heart is an organ made up of different types of tissues, each of which has different types of cells. II. The heart is a tissue made up of different types of organs, each of which has different types of cells. III. The heart is a system made up of one type of tissue and identical cells. IV. The heart is a tissue made up of one type of organ and identical cells. Your answer:.
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