Imagine that you cannot bend your legs at the
knees.Is it possible to climb stairs,or walk on the

Dear Student.
Please find below the solution to the asked query.
Muscles in leg are concerned with movement and rotation.
There are a large number of muscles present in legs.
1. Knee muscles: Quadriceps, Tensor, Biceps etc
These muscles perform the function of rotation and extension.
2. Foot muscle: Tibialis, Extensor, Triceps etc.
These muscles aid in the different types of movement.
3. Hip muscle: Quadratus, Gluteus, Adductor etc.
These muscles aid in lateral rotation and extension.

So if such muscles are not present, then we cannot bend our legs and thus will not able to climb or walk.

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