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.
Where is my left upper quadrant? The left upper quadrant (LUQ) is a section of your tummy (abdomen). Look down at your tummy, and mentally divide the area from the bottom of your ribs down to your pubes into four quarters. The quarter on your left side closest to your ribs is your LUQ. By Blausen.com staff (2014).