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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Residual urine is?
assistant
The correct answer is  Initially urinary bladder respond at irregular intervals to adequate internal distance and by contraction of detrusor muscle. these contractions are not powerful enough or well coordinator result in incomplete maturation. Thus a large volume of urine may be left in the bladder called as residual urine. Ref: page no 584 Textbook of physiology Volume 1 AK Jain 7th edition