Select the correct statement.
i) Thoracic chamber is an open chamber filled with air.
ii) Thoracic chamber is built by dorsal ribs, ventral vertebral column, lower diaphragm and a lateral sternum.
iii) Any change in the thoracic cavity volume is not reflected in the lung cavity because of the anatomical setup of the lungs in the thorax.
iv) Humans can’t directly alter the pulmonary volume.