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This Concept Map has information related to: Human Body Organ System, Nervous System is A highly specialized network whose principle components are neurons cells; Neurons are interconnected to each other in complex arrangements, and have the property of conducting, using electrochemical signals, a great variety of stimuli both within the nervous tissue as well as from & towards most of the other tissues. Thus, neurons coordinate multiple functions in organisms; Non-neuron cells Glial provide support and protection for neurons. They are thus known as the "glue" of the nervous system. The four main functions of glial cells are to surround neurons and hold them in place, to supply nutrients and oxygen to neurons, to insulate one neuron from another, and to destroy pathogens and remove dead neurons, Excretory System includes body parts Sweat glands, Liver, Lungs, Kidney system, Human Body's Organ Systems include Musculoskeletal System (Locomotor system), Autonomic nervous system has types Sympathetic division, Digestive System (Gastrointestinal Tract) is The organs that takes in food, digests it to extract energy & nutrients, & expels the remaining waste; The major functions of the GI tract are ingestion, digestion, absorption, defecation, Circulatory System (Cardiovascular) includes Systemic Circulation, Nervous System has types of Somatic nervous system, Musculoskeletal System (Locomotor system) is An organ system that gives animals the ability to physically move using the muscles & skeletal system, Excretory System performs Excretion of wastes; Elimination of useless by-products excreted from cells; Eradication of harmful chemical build-ups; Maintenance of steady, balanced chemical concentration, Parasympathetic division is responsible for Constriction of the pupil, slowing of the heart, dilation of the Blood vessels, & stimulation of the digestive & geni- tourinary systems etc.