Fleur de Campanule Démontée

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The human body is a complex and dynamic system that functions on multiple levels simultaneously. At its core, it is made up of trillions of cells working together to maintain homeostasis and respond to changes in the environment. The brain, which accounts for only about 2% of the body's total mass, plays a crucial role in regulating many bodily functions through the release of neurotransmitters and hormones that travel through the bloodstream to target specific organs and tissues.