I think that would be the meniscus.
The primary proximal end landmarks of the tibia are the lateral and medial condyles. These bumps at the top of the tibia are the site where the tibia articulates with the femur. Between the condyles is the intercondylar area, which is the place where the ligaments of the knee attach. The meniscus attaches in the intercondylar area as well.
Cartilage
The medial and lateral condyles of the femur are located in the knee. They articulate with the tibia.
medial condyles
The medial and lateral condyles, located on the femur and the tibia, form the knee joint. The medial condyle, which is closer to the center of the body, is larger.
The gastrocnemius is biarticulate (crosses both knee and ankle joint) and originates at femur (post femoral condyles), performing both concentric plantar flexion and knee flexion. The soleus originates at the posterior fibular head and the tibia (soleal line), performing only concentric plantarflexion.
The distal end of the tibia
The meniscus acts as a shock absorber and cushion between the femur and tibia. It's the cartilage in the knee.
The meniscus is cartilage that covers the top of the tibia (shin bone) and acts as a cushion between the tibia and femur (thigh bone).
Four ligaments are present in the knee joint, the medial collateral ligament, lateral collateral ligament, anterior cruciate ligament, and posterior cruciate ligament. The medial collateral ligament is located at the inside of the knee joint. It extends from the medial femoral epicondyle to the tibia. The lateral collateral ligament is located at the outside of the knee joint. It extends from the lateral femoral epicondyle to the head of the fibula. The anterior cruciate ligament extends posterolaterally from the tibia and inserts on the lateral femoral condyle. The posterior cruciate ligament extends anteromedially from the tibia posterior to the medial femoral condyle.
the tibia is the bone in that section of the leg
The femur articulates with the medial and lateral condyles of the tibia. The femur is the bone commonly known as the thigh bone.