Final answer:
The term for a '3 inch tube' that connects to the 'universe 2000 side of the body' is not clear, but anatomically, the urethra connects the bladder to the external urethral orifice.
Step-by-step explanation:
The tube mentioned in the question seems to lack a direct context, but given the information provided and typical anatomical terms, what best fits the description is likely the urethra, which is an essential part of the human body's excretory system.
Therefore, the most appropriate answer would be the urethra, not necessarily an 'inlet tube', 'outlet tube', 'connecting tube', or 'universe tube'.
While the term '3 inch tube' is vague, the urethra's function is to connect the urinary bladder to the external urethral orifice, allowing for the excretion of urine.