Joints are where two bones meet. Ball and socket joint: allows all-directional movement (shoulder, hip). Hinge joint: like a door hinge โ only bends and straightens (knee, elbow, fingers). Pivot joint: rotational movement (neck โ turns head). Fixed joint: no movement (skull bones). Gliding joint: slight movement (wrist, ankle).
How to study this topic
Read the core explanation once without solving.
Open the formula links below and connect them with the topic meaning.
Practice the 10 example pages one by one.
Use the AI ask page for text, voice or image-based doubts.