Skeletal System

206 bones

How does the skeletal System work?

206 adult bones that support, protect, store minerals and make blood cells in the marrow.

Evidence & sources

• The adult skeleton has 206 bones, and bone marrow makes blood cells. Evidence: established. Known: Basic anatomy. Unknown: Exact counts vary slightly between people. Source: NIH National Cancer Institute (SEER Training), Introduction to the Skeletal System (Current revision).

Connected topics

• Bone Tissue
• Knee Joint
• Calcium
• Vitamin D
• Phosphorus
• Strength Training

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General education only, not medical advice. Drafted Oct 2026 · pending qualified expert review.