Cardiorespiratory and thermal responses to hypercapnia in chickens exposed to CO2 during embryonic development

In conclusion, among cardiorespiratory and metabolic variables, the ventilatory response to hypercapnia can be attenuated by pre-exposure to 1% CO2 during embryonic development, especially in male chicks up to 10 days.
Source: Respiratory Physiology and Neurobiology - Category: Respiratory Medicine Source Type: research