This's an incredibly awesome, a real-time photograph of our gastrointestinal tract. The gastrointestinal system is a smart tunnel, a hollow muscular tube extending from oral cavity all the way upto the anus. It's length is nine meters (30 feet). •GIT performs various functions like; 1) Both chemical and mechanical digestions. 2) Absorption of digested food. 3) Assimilation of digested food throughout the body. 4) Excretion of undigested food via the anus and more. 📷•Medicogram•