Dan

sketchfab

The human body is a complex machine that operates on a multitude of systems, working together to keep us alive and functioning at optimal levels. The circulatory system pumps blood throughout our veins, supplying oxygen and nutrients to every cell, while the nervous system transmits signals to our muscles and organs, controlling everything from movement to digestion. The digestive system breaks down food into energy-rich molecules that are absorbed by the body, providing sustenance for growth and repair. Meanwhile, the respiratory system takes in oxygen through our lungs, expelling carbon dioxide as a waste product. The skin protects us from external threats, regulating temperature and maintaining fluid balance.