what is the difference between fundamental quantities from derived quantities? Nature itself doesn't have fundamental or derived quantities. We have choices of units with more or less direct ties to things we measure. In modern systems of units, we try to simplify things by making units for different quantities have simple relations.
The left lower quadrant (LLQ) contains the distal descending colon, the sigmoid colon and the left ureter. Depending on the sex of the individual, both the left and right lower quadrants contain either an ovary, a uterine tube, a ductus deferens, the uterus and the urinary bladder.
The bladder. The bladder is where urine gets stored before going to the toilet. The bladder holds around 400 to 600ml or urine. The bladder is located in the pelvis above and behind the pubic bone. It is pear shaped, and about the same size as a pear when it is empty.