Unstriped smooth muscles are found in

What do ligaments connect?

The biceps and triceps muscles are found in

What is a sarcomere?

Choose the correct properties of muscle fibres.
$I.$ Muscle fibre is lined by the plasma membrane called sarcolemma.
$II.$ Cytoplasm of the muscle fibre is called tonoplasm.
$III.$ Sarcolemma of the muscle fibre encloses the sarcoplasm.
$IV.$ Muscle fibre is a syncytium.
Select the correct option.

Contraction of muscle fibre takes place by the sliding of $:-$