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The human body is a complex and intricate system made up of various organs and tissues that work together to maintain overall health and function. The brain, heart, lungs, liver, kidneys, and other vital organs play critical roles in regulating bodily functions such as movement, digestion, respiration, circulation, waste removal, and temperature regulation. The nervous system, which includes the brain and spinal cord, enables communication between different parts of the body through electrical impulses. The circulatory system transports oxygenated blood throughout the body, while the digestive system breaks down food into nutrients that can be absorbed and utilized by cells. In addition to these systems, other vital organs such as the pancreas, thyroid gland, and adrenal glands help regulate hormone production, metabolism, and energy levels. Moreover, the immune system protects the body from foreign substances and pathogens, while the skeletal and muscular systems provide support and facilitate movement.