Final answer:
The term that estimates the oxygen carried by hemoglobin and dissolved in plasma is CaO2. It encapsulates both the oxygen bound to hemoglobin, which constitutes the majority, and the oxygen dissolved in the plasma.
Step-by-step explanation:
The value that estimates the amount of oxygen carried by the hemoglobin as well as that dissolved in the plasma is known as CaO2, which stands for oxygen content of arterial blood. This includes the oxygen bound to hemoglobin as well as the oxygen dissolved in the plasma. While 98.5 percent of oxygen in the blood is bound to hemoglobin, the remaining 1.5 percent is dissolved in the plasma. Each hemoglobin molecule has the potential to bind up to four oxygen molecules, and the oxyhemoglobin formed is what carries oxygen from the lungs to body tissues. The blood's ability to carry oxygen is greatly enhanced by hemoglobin, compared to the low concentration that would be available if oxygen were only dissolved in the plasma.
The amount of oxygen carried by hemoglobin as well as that dissolved in the plasma can be estimated using several parameters:
PaO2: The partial pressure of oxygen in arterial blood, which represents the amount of dissolved oxygen in the plasma.
CaO2: The total oxygen content in arterial blood, including oxygen bound to hemoglobin and dissolved in the plasma.
SaO2: The oxygen saturation of hemoglobin, which indicates the percentage of hemoglobin molecules bound to oxygen.
These parameters provide insights into the oxygen-carrying capacity of blood and its distribution to different tissues in the body.