Answer:
The correct answer would be the pulmonary vein and the superior vena cava.
Pulmonary vein is a blood vessel of pulmonary circulation which carries oxygenated blood from lungs to the left atrium of the heart. Hence, it is rich in oxygen and carries carbon dioxide in the least amount.
In contrast, vena cava is a part of systemic circulation and carries deoxygenated blood from the body to the right atrium of the heart. They are two venae cavae in human beings namely; inferior vena cava (carries blood from lower body) and superior vena cava (carries blood from head, arms and upper body). Hence, it contains maximum carbon dioxide and least oxygen.
The greatest difference in the concentration of respiratory gases is found in the pulmonary vein and the superior vena cava of the mammalian blood vessels.
Any gas that takes part in the process of respiration, is referred to as respiratory gas. Respiratory gases majorly include Oxygen and the carbon-dioxide.
The pulmonary vein collects the oxygenated blood and carries it from the lungs back to the heart. These veins do the opposite job of pulmonary arteries. As the pulmonary vein collects oxygenated blood, it carries a large amount of oxygen and the least amount of carbon dioxide.
On the other hand, the superior vena cava helps in draining a large amount of deoxygenated blood from the head, neck, eyes, and upper limbs into the upper left chamber (right atrium) of the heart. As superior vena cava carries blood from the upper body, it contains the maximum amount of carbon dioxide and the least oxygen.
Therefore, the greatest difference in the concentration of respiratory gases is found in the pulmonary vein and the superior vena cava of the mammalian blood vessels.
To learn more about the Respiration process, refer to the link:
https://brainly.com/question/22673336
