Lymph heart
ORGAN FOR CIRCULATION OF LYMPH IN SOME VERTEBRATES
Lymph Hearts; Lymph hearts
A lymph heart is an organ which pumps lymph in lungfishes, amphibians, reptiles, and flightless birds back into the circulatory system. In some amphibian species, lymph hearts are in pairs, and may number as many as 200 in one animal the size of a worm, while salamanders have as many as 23 pairs of lymph hearts.