Planeten-white

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The human body is a complex machine that is made up of many different systems and organs that work together to keep us alive. The skeletal system provides support and structure for our bodies, while the muscular system allows us to move around and perform various activities. The nervous system sends signals from our brain to the rest of our body, allowing us to feel sensations and react to stimuli. Our circulatory system transports oxygen and nutrients throughout our body, while our digestive system breaks down food into energy that we can use. Our respiratory system brings oxygen into our lungs, where it is then distributed throughout our body. The immune system protects us from diseases and infections by producing antibodies and activating white blood cells.