Anatomy quizzes › Lower Limb Anatomy

Lower Limb Anatomy Quiz

Fourteen questions on the bones of the leg, the ligaments that hold your knee together and the nerves that keep you walking. Tap an answer to see if you’re right.

  1. Question 1 of 14

    Name the highlighted bone.

    Front view
    1. Fibula
    2. Tibia
    3. Humerus
    4. Femur
    Show answer

    Answer: Femur. The thigh bone, the longest and strongest bone in the body. Roughly a quarter of your height.

  2. Question 2 of 14

    Name the highlighted bone.

    Front view
    1. Tibial tuberosity
    2. Head of fibula
    3. Patella
    4. Fabella
    Show answer

    Answer: Patella. The kneecap, the body’s largest sesamoid bone. It sits in the quadriceps tendon and gives the muscle better leverage.

  3. Question 3 of 14

    Name the highlighted bone, the main weight-bearing bone of the lower leg.

    Front view
    1. Tibia
    2. Radius
    3. Fibula
    4. Femur
    Show answer

    Answer: Tibia. The tibia, or shin bone. Its front edge sits right under the skin, which is why shin knocks hurt so much.

  4. Question 4 of 14

    Name the highlighted thin bone on the outer side of the lower leg.

    Front view
    1. Ulna
    2. Fibula
    3. Tibia
    4. Femur
    Show answer

    Answer: Fibula. The fibula carries little weight but anchors muscles and forms the outer ankle bone (lateral malleolus).

  5. Question 5 of 14

    Name the highlighted ligament.

    Right knee, front (kneecap off)
    1. Lateral meniscus
    2. Medial collateral ligament (MCL)
    3. Anterior cruciate ligament (ACL)
    4. Posterior cruciate ligament (PCL)
    Show answer

    Answer: Anterior cruciate ligament (ACL). The ACL stops the tibia sliding forward. It tears with pivoting, landing and sudden stops, and female athletes tear it more often than male athletes.

  6. Question 6 of 14

    Name the highlighted ligament.

    Right knee, front (kneecap off)
    1. Patellar ligament
    2. Posterior cruciate ligament (PCL)
    3. Anterior cruciate ligament (ACL)
    4. Lateral collateral ligament (LCL)
    Show answer

    Answer: Posterior cruciate ligament (PCL). The PCL stops the tibia sliding backwards. Classic injury: the knee hitting the dashboard in a car crash.

  7. Question 7 of 14

    Name the highlighted ligament on the inner side of the knee.

    Right knee, front (kneecap off)
    1. Medial collateral ligament (MCL)
    2. Medial meniscus
    3. Lateral collateral ligament (LCL)
    4. Anterior cruciate ligament (ACL)
    Show answer

    Answer: Medial collateral ligament (MCL). The MCL resists the knee being pushed inwards, so a blow to the outside of the knee is the usual culprit.

  8. Question 8 of 14

    Name the highlighted C-shaped cartilage.

    Right knee, front (kneecap off)
    1. Articular cartilage
    2. Lateral meniscus
    3. Medial collateral ligament
    4. Medial meniscus
    Show answer

    Answer: Medial meniscus. The medial meniscus. It’s torn more often than the lateral meniscus, partly because it’s less mobile.

  9. Question 9 of 14

    Foot drop after a knock to the outside of the knee, just below it, suggests injury to which nerve?

    1. Sural nerve
    2. Tibial nerve
    3. Common fibular (peroneal) nerve
    4. Femoral nerve
    Show answer

    Answer: Common fibular (peroneal) nerve. The common fibular nerve wraps around the neck of the fibula, right under the skin, and lifts the foot and toes.

  10. Question 10 of 14

    Which is the largest nerve in the body?

    1. Sciatic nerve
    2. Vagus nerve
    3. Femoral nerve
    4. Spinal cord
    Show answer

    Answer: Sciatic nerve. The sciatic nerve, about as wide as your thumb where it leaves the pelvis. It splits into the tibial and common fibular nerves above the knee.

  11. Question 11 of 14

    How many bones are in each foot (not counting sesamoids)?

    1. 33
    2. 26
    3. 14
    4. 19
    Show answer

    Answer: 26. 26: 7 tarsal bones, 5 metatarsals and 14 phalanges. Both feet together hold about a quarter of the body’s bones.

  12. Question 12 of 14

    What is the heel bone called?

    1. Navicular
    2. Cuboid
    3. Talus
    4. Calcaneus
    Show answer

    Answer: Calcaneus. The calcaneus, the largest tarsal bone. The Achilles tendon attaches to the back of it.

  13. Question 13 of 14

    Which foot bone has no muscles attached to it?

    1. Navicular
    2. Talus
    3. Cuboid
    4. Calcaneus
    Show answer

    Answer: Talus. The talus links the leg to the foot but has no muscle attachments; ligaments and the bones around it hold it in place.

  14. Question 14 of 14

    Which muscle group straightens (extends) the knee?

    1. Adductors
    2. Hamstrings
    3. Quadriceps
    4. Gastrocnemius
    Show answer

    Answer: Quadriceps. The quadriceps, at the front of the thigh, supplied by the femoral nerve. The hamstrings bend the knee.

Want one a day? Play Anatomegaly, the daily anatomy game: five body parts, four options each, new every midnight.

Common questions

What are the bones of the lower limb?

The hip bone (part of the pelvis), femur, patella, tibia and fibula, then the 26 bones of the foot: 7 tarsals (talus, calcaneus, navicular, cuboid and three cuneiforms), 5 metatarsals and 14 phalanges.

What are the four main ligaments of the knee?

The anterior cruciate (ACL) and posterior cruciate (PCL) ligaments inside the joint, which stop the tibia sliding forwards and backwards, and the medial (MCL) and lateral (LCL) collateral ligaments on the sides, which stop it bending sideways.

What is the difference between a meniscus and a ligament?

Menisci are C-shaped pads of cartilage that cushion and stabilise the knee between the femur and tibia. Ligaments are tough bands that join bone to bone. Twisting injuries can damage both.

How do I learn lower limb anatomy fast?

Learn the bones and joints first, then group the muscles by compartment and action (front of thigh extends the knee, back of thigh bends it), then add the nerve for each compartment.

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Reviewed 8 November 2026 by a Malady Wise GP. Diagrams are simplified, original sketches, not to scale. General education, not personal medical advice.