Doxycycline may cause birds.
The PCO2 is the partial pressure of carbon dioxide -LRB- CO2 -RRB- , normally used in reference to blood , but also used in Oceanography to describe the partial pressure of CO2 in the Ocean .. partial pressure. partial pressure. carbon dioxide. carbon dioxide. blood. blood. Usually the arterial blood is the relevant context ; the symbol for PCO2 in arterial blood is PaCO2 .. blood. blood. arterial blood. arterial blood. Measurement of PaCO2 in the systemic circulation indicates the effectiveness of ventilation at the lungs ' alveoli , given the diffusing capacity of the gas .. systemic circulation. systemic circulation. ventilation. ventilation ( physiology ). alveoli. pulmonary alveolus. diffusing capacity. diffusing capacity. It is a good indicator of respiratory function and the closely related factor of acid -- base homeostasis , reflecting the amount of acid in the blood -LRB- without lactic acid -RRB- .. blood. blood