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 one 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)
