Air passes through is: Nostrils → nasal cavity →Pharynx → Larynx →Trachea → Bronchi (with cartilaginous rings) →Bronchioles (without rings) → Alveoli (air sacs). Alveoli are the seat of exchange of O2 / CO2 between lungs and blood.
Earth has water. This is crucial to diversity. It also has many climates and ecological niches.
Wait a second is this your last question
Photosynthesis:
<span>6CO2 + 6H2O + energy yields C6H12O6 + 6O2 </span>
<span>Respiration: </span>
<span>C6H12O6 + 6O2 yields 6CO2 + 6H2O + energy </span>
