Gaseous exchange is a process of the respiratory system where gases such as oxygen (O 2 ) and carbon dioxide move between the lungs and blood. Oxygen is an important gas that is used by the tissues for metabolism . The O 2 in the blood usually exists in bound form with hemoglobin as oxyhemoglobin. The oxygen extraction ratio is an index of O 2 utilization by a tissue. It is the amount of oxygen used by the tissue from the blood. The concentration of PO 2 (partial pressure of O 2 ) and O 2 in the blood is an index for oxygen transport.

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Chapter 22.3, Problem 19BYGO

Summary Introduction

Introduction:

Gaseous exchange is a process of the respiratory system where gases such as oxygen (O₂) and carbon dioxide move between the lungs and blood. Oxygen is an important gas that is used by the tissues for metabolism. The O₂ in the blood usually exists in bound form with hemoglobin as oxyhemoglobin. The oxygen extraction ratio is an index of O₂ utilization by a tissue. It is the amount of oxygen used by the tissue from the blood. The concentration of PO₂ (partial pressure of O₂) and O₂ in the blood is an index for oxygen transport.

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