This lecture introduces the second major section of our course, Development and Homeostasis, by setting up two major questions: First, how do single cells proliferate and form complex multicellular organisms with a diverse array of different cell types? Second, how do different cell types in a complex multicellular organism coordinate their activities in such a way as to maintain the integrity and function of the organism as a whole? The first question brings us to a discussion of developmental biology, while the second brings us to a discussion of homeostasis and the physiological mechanisms organisms use to protect and maintain an internal environment.
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