Which is NOT an essential function of the skeleton?

The skeleton serves several vital functions in the human body, and one of those functions does not include facilitating digestion. The primary roles of the skeletal system encompass serving as a mineral reservoir, producing red blood cells through the process of hematopoiesis, and providing attachment points for muscles, which enables movement and stability.

Facilitating digestion is primarily the role of the gastrointestinal system, which includes organs such as the stomach and intestines. While bones may indirectly support digestion by providing structure to the body, they do not play a direct role in the digestive process itself. Therefore, it is clear that among the listed functions, facilitating digestion is not considered an essential function of the skeleton.