Question

how do floating ribs contribute in the breathing process​

Answer 1

Required Answer:-

The ribs and intercoastal muscles helps in the expansion and contraction of lungs during inhalation and exhalation of air. The floating ribs helps the lungs to expand more in the lower lobes. This enables more air to enter and exit.

Process of breathing (external respiration):

• The air enters because of pressure difference from the atmosphere into our body through nostrils.
• It then goes to pharynx, then larynx and then the trachaea or the windpipe. Further it divides into bronchi, bronchioles and finally reached alveoli$.$
• When the ribs and intercoastal muscles expands, the diaphragm flattens, the volume increases and pressure decreases.
• Air enters from higher pressure (environment) to lower pressure (into our body).
• Then after gaseous exchangein alveoli, the ribs pushes outs the air and the diaphragm forms a dome shaped to increase pressure and decrease the volume.
• The air rushes out through the earlier path.