Skeletal functions include which of the following?

• A. Enables rapid nerve conduction throughout the body
• B. Produces hormones to regulate metabolism
• C. Transports oxygen to tissues
• D. Provides support and protection for other tissues, stores calcium and other minerals, forms blood cells

Answer: (D)

The main idea is that the skeleton serves as the body’s framework and protection system, while also acting as a key storage site and blood cell producer. Bones provide structural support for the body and shield delicate organs (like the brain, heart, and lungs). They also house bone marrow, the site of hematopoiesis, where red blood cells, white blood cells, and platelets are formed. Additionally, bones store minerals, especially calcium and phosphorus, and release them into the bloodstream as needed to help maintain mineral balance and support vital functions like muscle contraction and nerve signaling.

Rapid nerve conduction isn’t a skeletal function—it’s a job of the nervous system. Hormone production is primarily an endocrine function, though bones can influence metabolism indirectly. Oxygen transport is carried by blood cells in the circulatory system, not by the skeleton itself. So the description that includes support, protection, mineral storage, and blood cell formation best captures what the skeletal system does.