Joints are, fairly self-evidently, where bones meet.
Joints are, fairly self-evidently, where bones meet. With the exception of the big toe, each of the other toes have three joints. These include:
- Proximal interphalangeal joint (PIP) – in the middle of the toe
- Metatarsophalangeal joint (MCP) – situated at the base of the toe
- Distal phalangeal joint (DP) – the joint closest to the tip of the toe.
At a joint, bone surfaces carry a layer of cartilage - a tissue which allows bone surfaces to move smoothly against one another. Movement is also helped by a lubricant secreted by a thin membrane called the synovium, which encases the joint.