Which organs are considered solid within the abdomen?

• A. Stomach, Intestines
• B. Bladder
• C. Liver, Spleen, Kidneys
• D. Esophagus

Answer: (C)

Abdominal solid organs are dense parenchymal structures without a long central lumen, while hollow organs form cavities that hold contents.

Liver, spleen, and kidneys fit solid category: the liver is a large, highly vascular solid mass; the spleen is a solid mass of lymphoid tissue; the kidneys are compact, dense organs whose bulk is solid tissue (with only a small collecting system inside). In contrast, hollow organs like the bladder, stomach, intestines, and esophagus contain lumens for storing or transporting contents and are designed around that cavity. Therefore, the solid group in the abdomen is liver, spleen, and kidneys.