PATHOLOGY

Detailed explanation-1: -The gas oxygen is essential to perform cellular respiration and obtain energy from your food. During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts.

Detailed explanation-2: -In cell respiration, glucose and oxygen will react and release energy along with water and carbon dioxide. Hence the gas produced in respiration is Carbon dioxide.

Detailed explanation-3: -Oxygen is required in the cellular respiration in the electron transporter chain. It serves as the final electron acceptor of the electron transport chain facilitating the movement of electrons down the chain hence producing the ATP or adenosine triphosphate.