Final answer:
Nasal breathing is breathing through the nose rather than the mouth and is superior due to various reasons such as filtering particles and creating pressure in the lungs. Infants begin independent breathing after the umbilical cord is cut and carbon dioxide accumulates in their blood.
Step-by-step explanation:
Nasal Breathing
Nasal breathing is breathing through the nose rather than the mouth. It is generally considered to be superior to mouth breathing because it filters particles, warms and moistens the air, and creates greater pressure in the lungs during exhalation. The development of the respiratory system in infants starts in utero, but they begin breathing independently after birth when the umbilical cord is cut and carbon dioxide builds up in their blood.