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人体内各个器官系统协调配合,使各种复杂的生命活动能够正常进行。让我们与美国同学一起上一堂生物课吧——The human body is a complex machine that carries out multiple jobs at the same time.The smallest unitof life in the human body is a cell.A group of similar cells that work together to carry out a function makeup a tissue.In turn,different tissues are organized into various organs.The organs then work together as part
Coordination of various organ systems in the human body, so that a variety of complex life activities can be carried out normally. The human body is a complex machine that carries out multiple jobs at the same time. The smallest unit of life in the human body is a cell. A group of similar cells that work together to carry out a function makeup a tissue.In turn, different tissues are organized into various organs.The organs then work together as part