Flexor Digitorum Longus Muscle Usually written 長趾屈筋.

Flexes the knee and extends of the hip joint. It is important in running, so it is common to see it more developed in long-distance runners.

This is where we can get a peek of bone this time. From a water caltrop-shaped window, we can catch a glimpse of Peko-chan's ligament-covered femur (♡). Its historic Japanese name is hikagami. Water caltrops are plants that bear nuts which appear to have spikes or horns.The large pink Kanji just above this text is a scaled-up "hikagami".

A long ligament which runs from the outer side of the butt to the outer edge of the knee.

The most superficial of the three hamstring muscles. From the outside you can't tell because it's hidden, but it actually bifurcates. I want to ham it. Not sure how to translate ハムハムしたい, it's probably a meaningless pun on hamstrings.

The "butt muscle". In this case, it is pulled tight and along with minimal adipose tissue forms a flexible buttock. Very awkward to translate into English.

Just as the name suggests, it is a long muscle that extends from the fibula to the undersides of the smaller four digits of the foot.

The "calf muscle". The lower portion becomes the Achilles tendon and attaches to the calcaneal tubercle. It is used in activities such as tiptoeing and running.

Its location, function, and name are similar to the semitendinosus muscle. Just remember the two as "the deep hamstrings" and you should be okay.

One of the muscles of a group that adducts the hip joint. It is thin and long. It runs from the inner side of the knee to the point where the pubis bone fuses with the pelvic bone, tracing the most romantic path of any muscle.

The largest muscle in the muscle group that adducts (internally rolls) the hip joint.

Links the heel bone and the inner ankle.

The largest tendon in the human body. When contracting, it pulls the heel back causing the foot to point downward. This can result in the so-called ashipin. From what I can tell, ashipin refers to a strange phenomenon in which it is easier to orgasm when the legs are in this position, and people who do it too often when masturbating supposedly lose the ability to orgasm without doing it.

Mouthful memo For some reason, the popliteal fossa has many names in Japanese including utsuashi, yoboro, yoborokubo, and more. Hikagami supposedly comes from the phrase hikikagami (recede + crouch).

It is hidden behind the gastrocnemius muscle, but it is just as large and strong. Its shape resembles a hirame (lefteye flounder). The Japanese name is "hirame muscle".

Mouthful memo Aside from the left/right differences, lefteye flounder and righteye flounder can be told apart by the fact that lefteyes have larger jaws.

Learning with Orange Pekoe-chan: A girl's body (Lower extremity muscles, part 2) A buffed up plan!