Which of the following is not a function of the skeletal system?

$A$: On repeated application of stimuli,involuntary striped muscles undergo fatigue.
$R$: This is due to non-availability of $ATP$ molecules.

Write true or false. If false,correct the statement to make it true.
$(a)$ Actin is present in thin filament.
$(b)$ $H$-zone of striated muscle fibre represents both thick and thin filaments.
$(c)$ Human skeleton has $206$ bones.
$(d)$ There are $11$ pairs of ribs in man.
$(e)$ Sternum is present on the ventral side of the body.

While at ease,some monkeys spend their time searching for something in each other's fur,which they then eat. What are they actually searching for?

The receptors found in the muscles,tendons,and joints are:

We swing our arms while walking for $......$.