Answer:
Step-by-step explanation:
Blood in the Right Ventricle (RV):
The right ventricle receives deoxygenated blood from the body, which is high in carbon dioxide.
This blood is pumped to the pulmonary arteries and sent to the lungs for oxygenation.
In the lungs, carbon dioxide diffuses out of the blood and into the alveoli as a waste product.
Oxygen is taken up by the red blood cells in exchange for carbon dioxide in the alveoli.
Blood leaving the pulmonary circulation (now oxygenated) returns to the left atrium.
Blood in the Left Atrium (LA):
The left atrium receives oxygenated blood from the pulmonary veins, which is low in carbon dioxide.
This oxygen-rich blood is pumped into the left ventricle and then circulated to the rest of the body.
So, if you were to compare the amounts of carbon dioxide in blood samples taken from the RV and the LA:
The blood sample from the RV would have a higher concentration of carbon dioxide because it contains deoxygenated blood that has not yet been through the lungs to exchange carbon dioxide for oxygen.
The blood sample from the LA would have a lower concentration of carbon dioxide because it contains oxygenated blood that has already been through the lungs, where carbon dioxide was exchanged for oxygen.