Hemolymph, Coelomic Immunity, Extracellular Traps, and Fibrinolytic Enzymes: A Comprehensive Comparative Analysis
Abstract
Earthworms possess a circulatory and immune system that differs fundamentally from vertebrate blood physiology yet fulfills analogous functional roles. Instead of red blood cells and hemoglobin, earthworms rely on hemolymph and coelomic fluid—two multifunctional media that support oxygen transport, nutrient distribution, immune defense, and hydrostatic regulation. Recent discoveries of extracellular traps (ETs) in earthworm coelomocytes reveal deep evolutionary conservation of chromatin based antimicrobial strategies. Earthworms also produce fibrinolytic enzymes, including lumbrokinase, with potent activity on vertebrate fibrin and thrombin, offering promising biomedical applications. This manuscript synthesizes current knowledge on earthworm circulatory architecture, hemolymph composition, coelomic immunity, ET formation, fibrinolytic biochemistry, and ecological and evolutionary context. The integration of these systems highlights the sophistication of earthworm physiology and its relevance to comparative biology, soil ecology, and human medicine.
How to Cite This Article
Dr. John Warren Reynolds, Wilma M Reynolds (2026). Hemolymph, Coelomic Immunity, Extracellular Traps, and Fibrinolytic Enzymes: A Comprehensive Comparative Analysis . International Journal of Biological and Biomedical Research (IJBBMR), 2(5), 94-101. DOI: https://doi.org/10.54660/IJBBR.2026.2.5.94-101