Summary: "Bread & Butter " Physiology"Bread & Butter" Physiology is designed to serve the needs of students doing their undergraduate courses in physiology, necessary for studies in health services (e.g. nursing, radiography, occupational and physiotherapy, pharmacy, chiropractics, etc.): in biological laboratory technology (e.g. medical, dental and veterinary technology, etc.) and in nutrition, domestic science, dietetics, physical training, biokinetics, first aid, speech therapy, etc.This textbook covers basic cellular physiology, physiology of all the different organ systems including the reproductive system. Relevant anatomical information and a limited working chemical background necessary for understanding the physiological principles and processes are also provided.A substantial effort was made to eliminate unnecessary detail and yet maintain the essential concepts and as such a dogmatic approach was unavoidable. The information is presented in a simple and logical manner so as to enable the students to grasp and understand the subject as a whole within a limited period of time.Blood is the main transport medium of the body: it carries oxygen from the lungs and chemical food