Human Anatomy is the science of understanding the structure and the parts of living organisms. Physiology, on the other hand, deals with the internal mechanisms and the processes that work towards sustaining life. These can include biochemical and physical interactions between various factors and components in our body. Human Physiology is referred to the physical, mechanical, and biochemical functions of humans. This connects health, medicine, and science in a way that studies how the human body acquaints itself to physical activity, stress, and diseases. We are thankful to Publisher Lambert Academic Publishing, European Union, and staff members for their cooperation in bringing out this book.