Chr Knight Test

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The human body is a complex system that is composed of multiple organs and tissues that work together to maintain overall health. The brain is responsible for controlling all functions of the body, including movement, sensation, perception, and cognition. It is located in the skull and weighs approximately 1.5 kg (3.3 pounds). The heart is a muscular organ that pumps blood throughout the body, supplying oxygen and nutrients to tissues. It beats around 100 times per minute at rest.