Composed of the heart, blood vessels, and blood, the circulatory system delivers oxygen and nutrients to every tissue in the body. This title intends to promote a basic understanding of the fundamental physical and biological principles underlying circulatory functions, and describes the anatomical features of the system.

Breathing is essential to human survival, as it gives us the necessary oxygen we need to live. Yet, the act of respiration is an involuntary process, something many people don't think about on a day-to-day basis. This book explains fundamental physical and biological principles underlying respiratory function.