By the end of this chapter, you will be able to:
- Explain the anatomy and physiology of the digestive system and other supporting organ systems
- Describe the relationship between diet and each of the organ systems
- Describe the process of calculating Body Mass Index (BMI)
- 3.2: The Basic Structural and Functional Unit of Life- The Cell
- The cell is the basic structural and functional unit of life. Cells are independent, single-celled organisms that take in nutrients, excrete wastes, detect and respond to their environment, move, breathe, grow, and reproduce. The macromolecules carbohydrates, proteins, lipids, and nucleic acids make up all of the structural and functional units of cells. In complex organisms, cells are organized into five levels so that an organism can conduct all basic processes associated with life.