Information on leg tendons can be gleaned from medical websites such as emedicinehealth.com or books such as Gray's Anatomy, which can be read online at Bartleby.com. Lower limb tendons include patellar tendons and Achilles tendons, emedicinehealth.com notes.
In general, tendons attach muscles to bones, the Academy of Orthopaedic Surgeons explains. The patellar tendon links the lower extremity of the kneecap to the upper edge of the shinbone. Along with the quadriceps muscles rectus femoris, vastus lateralis, vastus medialis and vastus intermedius and the quadriceps tendon, which attaches these muscles to the kneecap, the patellar tendon helps the knee straighten.
The Achilles tendon is found at the extremity of tissue formed by the union of the soleus and gastrocnemius muscles, commonly known as calf muscles, WebMD explains. The tendon links calf muscles to the heel bone, which is also known as the calcaneus. For this reason, the Achilles tendon is sometimes referred to as the calcaneal tendon.
The Achilles tendon is the strongest and largest tendon in the body, notes WebMD. The structure is composed of tough fibrous tissue and plays a critical role during walking, running and jumping. However, despite its considerable strength, the tendon is prone to injury due to its limited blood supply and the extreme tensions placed on it.