What surrounds some solid organs such as the liver and spleen?

The correct answer is that some solid organs, such as the liver and spleen, are surrounded by a thick fibrous capsule. This capsule, composed of connective tissue, serves several important functions. It provides structural support, maintaining the shape of the organ, and acts as a protective barrier against trauma. The fibrous capsule also helps to contain infections or bleeding that may occur within the organ, minimizing their spread to surrounding tissues.

Solid organs often have this capsule as opposed to hollow organs, which would have different structural needs. In the case of the liver and spleen, their relatively fragile tissues benefit from this additional protection. Understanding the structure of these organs is crucial in emergency medical situations, as it informs how injuries can affect their function and increase the risk of complications.