Animal Physiology How many hearts does a worm have? February 5, 2026 by Tanp | Leave a Comment Worms are fascinating creatures with unique physiological traits. One of the most intriguing aspects is their circulatory system, which includes multiple hearts. Worms, particularly earthworms, have five pairs of aortic arches that function similarly to a human heart, pumping blood throughout their segmented bodies. What Are the Main Features of a Worm’s Circulatory System? Worms […] Read more ยป