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The structure of living things from "summary" of The Magic of Reality by Richard Dawkins
Living things are built with a remarkable structure that is both intricate and functional. This structure allows them to carry out the processes necessary for life, from growth and reproduction to responding to their environment. At the heart of this structure are cells, the basic units of life. Cells come in many shapes and sizes, each with a specific role to play in the organism. Some cells are responsible for providing structure and support, while others are involved in carrying out essential functions such as producing energy or fighting off pathogens. Cells are organized into tissues, which in turn form organs and organ systems. This hierarchical organization allows living things to perform complex tasks by dividing the labor among specialized cells. For example, the human heart is made up of different types of cells that work together to pump blood throughout the body. Similarly, the roots, stems, and leaves of a plant each have a distinct structure that enables them to absorb water and nutrients, support the plant, a...
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