Question:
Planarians lack dedicated respiratory and circulatory
Last updated: 7/4/2023
Planarians lack dedicated respiratory and circulatory systems because Onone of their cells are far removed from the gastrovascular cavity or from the external environment they lack mesoderm as embryos and therefore lack the adult tissues deriver from mesoderm their flame bulbs can carry out respiratory and circulatory functions Otheir body cavity a pseudocelom