In the countercurrent exchange in a fish's gills,the oxygen concentration is always ________ in the water than the blood along the entire pathway of each lamella.
A)higher
B)lower
C)the same

Question

Quizplus · Accepted Answer

In countercurrent exchange in a fish's gills, the design ensures that the water flowing past the blood has a higher oxygen concentration. This gradient facilitates efficient oxygen transfer from the water to the blood throughout the entire pathway of each lamella.

In the Countercurrent Exchange in a Fish's Gills,the Oxygen Concentration