Which structures are located in the lower right quadrant of the abdomen?

• A. Intestines, ureter, urinary bladder, gonads, & appendix
• B. Liver, gallbladder, kidney, & pancreas
• C. Stomach, spleen, kidney, & pancreas
• D. Heart, aorta, inferior vena cava

Answer: (A)

In the lower right quadrant, you find structures around the ileocecal region: the appendix, portions of the ileum and ascending colon, and nearby retroperitoneal structures like the right ureter. Reproductive organs on the right side (right ovary or right testis) can be within this area, and the urinary bladder may extend into this quadrant when it’s full. This combination makes the set including intestines, the ureter, the urinary bladder, gonads, and appendix the best fit for the lower right quadrant.

The other options point to organs predominantly in other regions: the liver and gallbladder are mainly in the right upper quadrant; the stomach and spleen are on the left; and the heart and major vessels reside in the thorax/central upper abdomen.