I'd just like to add one thing. The word "regurgitate" is not limited to medical contexts. It can also be used in a figurative sense meaning "to repeat from memory something you have heard or read, often without thinking about the subject yourself." Example: A student in a Physics class has heard the professor talk about Einstein's Special Theory of Relativity. The student remembers the professor's words, but really doesn't understand the concepts very well. Later, the professor gives the class a written examination, and the student "regurgitates" the information. That is, the student answers the exam questions by repeating from memory what he has heard the professor say, but without really reflecting on their meaning.