Veterinary physiology deals with the investigation of animal systems and the functioning of these biological systems. It includes the study of study of how animals work and the physical and chemical processes that occur within animals. Animal physiologists study how animals react to internal and external elements in their environment. The examples of various biological processes in animals include gas exchange, blood and circulation, osmoregulation, digestion, nervous and muscle systems and endocrinology. Animal Physiology studies include the anatomy, histology and endocrine functioning of the physiological processes of livestock, under specific conditions. This also includes the possible manipulation of the reproductive processes by means of accelerated breeding techniques for more efficient livestock and poultry production. Professionals in this field of veterinary physiology explore the complete physiology of animals, including their genetics, their behaviors and their biological structure. Veterinary physiology includes both anatomy and physiology of an animal. Anatomy is the study of form and structure of organisms and physiology is the study of the function of an organism and the processes occurring in it which includes physical, chemical and biological, occurring within it.