Tibia and Fibula Unlabeled

Both lower leg bones from the front, knee to ankle: 11 parts to name.

Tibia and Fibula Unlabeled

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Tap the tibia

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Write the name of each numbered part.Answer key

  1. Tibia
  2. Fibula
  3. Medial condyle
  4. Lateral condyle
  5. Intercondylar eminence
  6. Tibial tuberosity
  7. Anterior border
  8. Medial malleolus
  9. Head of the fibula
  10. Lateral malleolus
  11. Interosseous membrane

Drawn for this site on 2026-10-05 by script. Licence: own drawing; outlines after a public domain plate.

Each numbered ring is a button. Use the arrow keys to move between them and Enter to choose. Names are read out in Study, and once a part is answered.

Next step Up a step: the femur above

All 11 parts on the diagram

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Start here: 7 main parts 7

  1. Tibia The shin bone: the larger, weight-bearing bone on the leg's medial side. Second longest in the body after the femur.
  2. Fibula The slender bone on the lateral side of the leg. It bears no weight and mainly anchors muscles.
  3. Medial condyle The medial half of the tibia's wide top. Its flat upper surface meets the femur's medial condyle at the knee.
  4. Lateral condyle The lateral half of the tibia's wide top. It meets the femur's lateral condyle. The head of the fibula joins its underside.
  5. Tibial tuberosity A raised area on the front of the tibia near the top. The tendon from the kneecap attaches here.
  6. Medial malleolus The large bump on the inside of the ankle. It is at the lower end of the tibia. The name means little hammer.
  7. Lateral malleolus The bony bump on the outside of the ankle. It is the lower end of the fibula and reaches lower than the medial malleolus.

The tibia: 7 2

  1. Intercondylar eminence The raised area between the condyles' joint surfaces. Two knee ligaments attach here.
  2. Anterior border The ridge down the front of the tibia. It starts at the tibial tuberosity and lies just under the skin.

The fibula: 4 2

  1. Head of the fibula The small knob at the top of the fibula. It joins the underside of the tibia's lateral condyle.
  2. Interosseous membrane The sheet of dense connective tissue joining the tibia and fibula. It runs along their shafts.

How this list was compiled: Read 2026-09-26. OpenStax Anatomy and Physiology 2e, section 8.4 Bones of the Lower Limb, https://openstax.org/books/anatomy-and-physiology-2e/pages/8-4-bones-of-the-lower-limb : the tibia (shin bone) as the larger, medial, weight-bearing bone, second longest after the femur; its medial and lateral condyles with flat tops meeting the femoral condyles, and no epicondyles; the intercondylar eminence between them for two knee ligaments; the tibial tuberosity on the anterior side near the top for the tendon associated with the patella; the anterior border running down from the tuberosity, just under the skin; the medial malleolus ('little hammer') on the medial ankle; the fibula as the slender lateral bone that bears no weight; the head of the fibula joining the inferior lateral tibial condyle; the lateral malleolus on the lateral ankle; the interosseous membrane uniting tibia and fibula. Licence: own work

The drawing: Drawn for this site on 2026-10-05 by script. The outlines of the two bones are taken from a public domain plate in Henry Gray, Anatomy of the Human Body (20th US edition, 1918), fig. 258, Bones of the right leg, anterior surface (https://commons.wikimedia.org/wiki/File:Gray258.png; Wikimedia Commons credits the plate to Henry Vandyke Carter). The inner lines, the tints, the hatching, the membrane and the end of the thigh bone are our own, placed by eye against the same plate. Where the picture departs from the bones: the fibula is drawn a little slimmer and bowed a little away from the tibia so the membrane between them can be seen, so its lower end, the lateral malleolus, is slimmer than in life; the outer edge of the tibia's top is drawn straighter than in life; and the joint surfaces on top of the tibia are shown a little deeper. Licence: own drawing; outlines after a public domain plate

How it works

The tibia and fibula unlabeled, from the front: the right lower leg with the knee at the top and the ankle below, and the membrane that joins the two bones. Start with the 7 main parts.

Read the full guide

The tibia

The tibia is the big shin bone on the inner side. Its wide top has medial and lateral condyles with the intercondylar eminence between them. Below is the tibial tuberosity, and the anterior border runs down the shin to the medial malleolus at the ankle.

The fibula

The fibula is the thin bone on the outer side and carries no weight. Its head sits under the tibia's lateral condyle, and its lower end is the lateral malleolus. The interosseous membrane joins the two shafts.

  • Medial malleolus on the tibia, lateral malleolus on the fibula: the outer ankle bump sits lower.

Questions and answers

Which is bigger, the tibia or the fibula?

The tibia. It is the main weight-bearing bone of the lower leg and the second longest bone in the body. The fibula is slender and bears no weight.

What are the malleoli?

The two ankle bumps: the medial malleolus at the lower end of the tibia, on the inside, and the lateral malleolus at the lower end of the fibula, on the outside.

What attaches to the tibial tuberosity?

The tendon that runs down from the kneecap. The tuberosity is the bump on the front of the tibia just below the knee.

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