A joint is anywhere two bones meet. We sort them two ways: by how much they move (functional) and by what holds them together (structural). Tap each — and watch how much it moves.
Immovable
Joints by movementhow freely they move
By amount of movement
📷 Reference image
A real labeled figure to compare with the interactive above.
Joint Classification — OpenStax, CC BY 3.0 (via Wikimedia Commons)
