The earthworm has the maximum number of hearts, possessing 5 pairs, totaling 10 hearts.
While the octopus, another fascinating creature, has 3 hearts, it falls short of the earthworm's impressive circulatory system. The earthworm's multiple hearts facilitate efficient circulation throughout its long, segmented body. Each pair of hearts functions to pump blood into the main vessels, ensuring that oxygen and nutrients are effectively distributed.
In contrast, the octopus utilizes its three hearts to manage its complex circulatory needs. Two hearts pump blood through the gills, while the third heart circulates blood to the rest of the body. This system supports the octopus's active lifestyle and unique physiology.
Therefore, comparing these two invertebrates, the earthworm distinctly wins the title for the animal with the maximum number of hearts.
