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The hinge joint between the arm and forearm, where three bones meet, allowing bending and straightening of the arm.
The elbow is a hinge (humerus with radius and ulna) for flexion and extension; the trochlea grips the ulna; collateral ligaments steady it; the ulnar nerve lies behind the medial epicondyle (funny bone); the radioulnar joint rotates the forearm.
Brachial Plexus
A network of nerves (roots C5–T1) that supplies the upper limb.
Femoral Triangle
A triangular space in the upper thigh containing major neurovascular structures.
Carpal Tunnel
The narrow passage at the wrist through which the median nerve and flexor tendons run.
The Knee Joint
The largest synovial joint in the body, a modified hinge between femur, tibia and patella allowing flexion, extension and slight rotation.
The Hip Joint
A ball-and-socket synovial joint between the head of the femur and the acetabulum, built for stability and weight-bearing.
The Shoulder Joint
A ball-and-socket synovial joint between the head of the humerus and the shallow glenoid cavity of the scapula, built for a huge range of movement.