Answer: lateral external intercostals and external intercostal muscles
Explanation:
The inspiration is the process of drawing air into the lungs. The primary muscles required for the inspiration include internal and intercostal muscles, parasternal portion required for the internal intercostal muscles.
These muscles can elevate the bony ribs when the air for breathing is inhaled and increase the air capacity for lungs.
the amount of CO2 found in the atmospheres varies over the course of a year how much of this variation happens because of the role of plants in the carbon cycle respiration occurs all the time but dominates during the colder months of the year resulting in higher CO2 levels in the atmosphere during those months.