Ray Vaughn Pierce

Ray Vaughn Pierce
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CHAPTER I. BIOLOGY. In this chapter we propose to consider Life in its primitive manifestations. Biology is the science of living bodies, or the science of life. Every organ of a living body has a function to perform, and Physiology treats of these functions. Function means the peculiar action of some particular organ or part. There can be no vital action without change, and no change without organs.... more...