01 / Location & anatomical relationships
Extending from the palm, alongside the thumb.
02 / Structure & organization
Most fingers have proximal, middle and distal phalanges, linked by interphalangeal joints and a metacarpophalangeal joint. Flexor tendons run in sheaths, while an extensor mechanism coordinates straightening across the digit.
03 / Function
Their joints let them bend around things you hold.
04 / Mechanism
Most fingers contain three small bones linked by joints. Tendons bend or straighten them, and ligaments guide the motion. Sensitive fingertips report pressure and texture so the brain can refine small movements.
Part of a bigger picture
The finger belongs in our arms & hands collection. Explore the nearby parts to see how this area of the body fits together.
Explore arms & hands →FOR DEEPER STUDY
Connect structure with function
Finger motion depends on both intrinsic hand muscles and extrinsic forearm muscles. Tendon pulleys keep flexor tendons close to bone during bending.
Check your understanding
Locate the finger in relation to its neighbors. Explain how the structural features described above support its function, then distinguish it from a nearby structure with a different role.
Keep learning
Continue with OpenStax Anatomy and Physiology for system-level study. This atlas is educational and has not undergone independent medical peer review.