Cells are the basic units of life from "summary" of Human Biology by Cecie Starr,Beverly McMillan
The cellular basis of life is a fundamental concept in biology. Cells are the smallest units of life, the building blocks from which all living organisms are constructed. They are the basic structural and functional units of living things, and each cell is a complex and dynamic system in its own right. Cells are capable of carrying out all the processes necessary for life, including growth, reproduction, and response to the environment. They are also highly specialized, with different types of cells performing specific functions within the organism. For example, muscle cells are specialized for contraction, while nerve cells are specialized for transmitting electrical signals. The cell is surrounded by a plasma membrane that separates it from its environment and regulates the passage of materials in and out of the cell. Within the cell, or...
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