The quadriceps muscle helps straighten and extend the leg and the hamstring helps bend the knee.
the synovial joint
That would be your biceps.
flexor
Quadriceps femoris
LCL
The only muscle of the leg that is made up of three muscles are the hamstrings.
Hamstrings ( Biceps Femoris, Semitendinosus & Semimembranosus) are the Agonistic Muscles Quadricpes ( Rectus Femoris, Vastus Lateralis, Vastus Medialis & Vastus Intermedius) are the Antagonistic Muscles Hope I Helped... Sharnie x :)
Deep knee bends.
knee
knee bends
The Gastrocnemius. There is another muscle involved in plantar flexion. The soleus and the tibialus posterior maintains the arch. The only one that does both actions, though, is the Gastrocnemius.
Spine. Bone, not muscle.
A flexor muscle.
flexion of the knee.
"It bends when you need it too. If we did not have that then you wouldn't be able to walk."what.