The Human Body

This machine is the human body. For millennia, philosophers, artists, and scientists have attempted to unravel its mysteries. While we have mapped the surface of Mars and plumbed the depths of the ocean, the landscape of our own internal biology remains one of the most fascinating frontiers of scientific discovery.

Imagine the most complex, efficient, and adaptable machine in the known universe. It is a biological engine capable of generating heat, processing complex energy sources, repairing itself, and harboring the spark of consciousness. It is a structure so resilient it can survive in the freezing tundra and the scorching desert, yet so delicate that a microscopic pathogen can bring it to its knees. The Human Body

The skin is the largest organ of the . For an average adult, it weighs about 8 pounds and covers 22 square feet. This machine is the human body

: Groups of organs working together, like the digestive or circulatory systems. Major Organ Systems Imagine the most complex, efficient, and adaptable machine

receive positive reviews for their "build-it-yourself" approach [8, 12]. Reviews on The Guardian