Final answer:
Another name for the gastrointestinal system is the Option a. alimentary tract, which refers to the continuous tube from the mouth to the anus involved in food processing.
Step-by-step explanation:
The gastrointestinal system, also known as the digestive system, consists of a series of organs including the mouth, esophagus, stomach, small intestine, and large intestine, forming a continuous tube for the digestion and absorption of nutrients, as well as the excretion of waste. One alternative name for the gastrointestinal system is the alimentary tract. The alimentary tract or alimentary canal is the same one-way tube that starts at the mouth and terminates at the anus, and through which food passes and is processed within the body.