👉 An opposed fluid, often found in biological systems such as the human body, refers to a type of fluid that flows in opposite directions within a closed system. For instance, in the circulatory system, blood flowing through arteries moves in one direction towards the heart, while blood returning to the heart from the body travels in the opposite direction through veins. This opposition ensures efficient circulation and proper oxygen and nutrient delivery to tissues, as well as the removal of waste products. The mechanism behind this flow is primarily driven by the heart's pumping action and the pressure gradients created within the vessels.
