What term describes organs such as the spleen, liver, kidneys, and pancreas?

• A. Glandular
• B. Tubular
• C. Solid
• D. Hollow

Answer: (C)

These organs are solid. They are composed of dense tissue that forms a compact mass and do not have a continuous hollow cavity (lumen) running through them. The spleen, liver, kidneys, and pancreas function as solid organs with parenchymal tissue making up most of their structure, even though some contain ducts or vessels. In contrast, hollow organs—like the stomach, intestines, and bladder—have a central lumen that can expand and contract and are built around layered walls. While some of these organs include glandular components (as in the pancreas) or have tubular elements (like ducts), the defining feature for this group is their solid, non-tubular nature.