Maintaining Life - Maintaining Life Necessary Life...

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Maintaining Life Necessary Life Functions Now that we have introduced the structural levels composing the human body, the question that naturally follows is: What does this highly organized human body do? Like all complex animals, human beings maintain their boundaries, move, respond to environmental changes, take in and digest nutrients, carry out metabolism, dispose of wastes, reproduce themselves, and grow. We will discuss each of these necessary life functions briefly here and in more detail in later chapters. Organ systems do not work in isolation; instead, they work together to promote the well-being of the entire body. Because this theme will be emphasized throughout this book, it is worthwhile to identify the most important organ systems contributing to each of the necessary life functions (Figure 1.3). Also, as you read through this material, you may want to refer back to the more detailed descriptions of the organ systems provided on pp. 3 through 6 and in Figure 1.2. Maintaining Boundaries
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Maintaining Life - Maintaining Life Necessary Life...

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