Integumentary System Physiological Phenomena: The properties and relationships and biological processes that characterize the nature and function of the SKIN and its appendages.Nervous System Physiological Phenomena: Characteristic properties and processes of the NERVOUS SYSTEM as a whole or with reference to the peripheral or the CENTRAL NERVOUS SYSTEM.Digestive System Physiological Phenomena: Properties and processes of the DIGESTIVE SYSTEM as a whole or of any of its parts.Dental Physiological Phenomena: Physiological processes and properties of the DENTITION.Digestive System and Oral Physiological Phenomena: Properties and processes of the DIGESTIVE SYSTEM and DENTITION as a whole or of any of its parts.Reproductive and Urinary Physiological Phenomena: Physiology of the human and animal body, male or female, in the processes and characteristics of REPRODUCTION and the URINARY TRACT.Musculoskeletal and Neural Physiological Phenomena: Properties, and processes of the MUSCULOSKELETAL SYSTEM and the NERVOUS SYSTEM or their parts.Circulatory and Respiratory Physiological Phenomena: Functional processes and properties characteristic of the BLOOD; CARDIOVASCULAR SYSTEM; and RESPIRATORY SYSTEM.Sports Nutritional Physiological Phenomena: Nutritional physiology related to EXERCISE or ATHLETIC PERFORMANCE.Reproductive Physiological Phenomena: Physiological processes, factors, properties and characteristics pertaining to REPRODUCTION.Physiological Phenomena: The functions and properties of living organisms, including both the physical and chemical factors and processes, supporting life in single- or multi-cell organisms from their origin through the progression of life.Elder Nutritional Physiological Phenomena: Nutritional physiology of adults aged 65 years of age and older.Urinary Tract Physiological Phenomena: Properties, functions, and processes of the URINARY TRACT as a whole or of any of its parts.Central Nervous System: The main information-processing organs of the nervous system, consisting of the brain, spinal cord, and meninges.Musculoskeletal Physiological Phenomena: Processes and properties of the MUSCULOSKELETAL SYSTEM.Nervous System: The entire nerve apparatus, composed of a central part, the brain and spinal cord, and a peripheral part, the cranial and spinal nerves, autonomic ganglia, and plexuses. (Stedman, 26th ed)Virus Physiological Phenomena: Biological properties, processes, and activities of VIRUSES.Blood Physiological Phenomena: Physiological processes and properties of the BLOOD.Central Nervous System Diseases: Diseases of any component of the brain (including the cerebral hemispheres, diencephalon, brain stem, and cerebellum) or the spinal cord.Peripheral Nervous System: The nervous system outside of the brain and spinal cord. The peripheral nervous system has autonomic and somatic divisions. The autonomic nervous system includes the enteric, parasympathetic, and sympathetic subdivisions. The somatic nervous system includes the cranial and spinal nerves and their ganglia and the peripheral sensory receptors.