What is the nature of the tracheal rings in a rabbit?

Identify the component of the respiratory system which displays the features given below and choose the correct option:
$I.$ Double layered
$II.$ Fluid contained in it reduces the friction on the lung surface
$III.$ Its outer layer is in contact with the thoracic wall
$IV.$ Its inner layer is in contact with the lungs

The arytenoid cartilage of the larynx is.......

What is the function of ciliated epithelium in the trachea?

Diaphragm is a dome-shaped muscular structure which separates

Vocal cords are situated at