HW [XYZ Shcool] Blocking

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The human body is a complex and intricate machine that is capable of incredible feats. The heart beats at an average rate of 60-100 times per minute, pumping over two billion drops of blood every day. This is made possible by the network of arteries, veins, and capillaries that transport oxygenated blood throughout the body. The brain is a highly advanced computer that controls everything from movement to emotions. It processes information at speeds of up to 268 miles per hour, making it one of the fastest computers on the planet. This is due in part to the billions of neurons that communicate with each other through electrical and chemical signals. The human immune system is a powerful defense mechanism that protects the body from harm. It consists of white blood cells, such as neutrophils and lymphocytes, which work together to fight off infections and diseases. The spleen plays a crucial role in filtering the blood and storing red blood cells. Human skin is the largest organ in the human body, accounting for approximately 15% of total body weight. It protects the body from external damage, regulates body temperature, and aids in the production of vitamin D. Human hair is made up of a protein called keratin and grows at an average rate of 0.3 to 0.4 millimeters per day. Human eyes are complex organs that detect light and transmit visual information to the brain. They contain millions of tiny rods and cones that convert light into electrical signals, allowing us to see in incredible detail. Human hearing is also a remarkable ability, with some people able to hear sounds as high as 20,000 Hz.