Mention briefly about the circulatory system of earthworm
Earthworms (Pheretima) have closed blood vascular systems, which includes the coronary heart, blood vessels, and capillaries. The coronary heart pumps blood for circulating it in a single direction. Blood is furnished via way of means of smaller blood cells to the gut nerve twine and the frame wall. Blood glands are gift withinside the 4 th , 5 th, and 6 th segments, which produce blood cells and haemoglobin dissolved in blood plasma. Blood cells in earthworms are phagocytic in nature.
