Cacing tanah

This time I will share a bit about Earthworm is a tubular worm and segmented in Annelida phylum. They are generally found living on the ground, eating organic matter alive and dead. The digestive system runs through its body length. Earthworms respirate through the skin. Earthworms have a dual transport system consisting of a fluid of fluid-moving fluid seloms and a simple closed circulatory system. It has central and peripheral nervous system. The central nervous system consists of two ganglia over the mouth, one on either side, connected to a neural rope running back along its length to motor neurons and sensory cells in each segment. A large number of chemoreceptors are concentrated near his mouth. The circular and longitudinal muscles on the periphery of each segment allow the worms to move. The same set of intestinal line muscles, and their actions move the food digested into the worm's anus. [2]

Earthworms are hermaphrodites - each individual carries both male and female sex organs. They have no internal or exoskeleton framework, but retain their structure by coelomic fluid space that serves as a hydrostatic framework.

"Earthworm" is the common name for the largest member of Oligochaeta (which is a class or upakelas depending on the author). In classical systems, they are placed in an order of Opisthopora, on the basis of male pores opening posteriorly to the pores of the female, although the anterior male segment is anterior to the female. Theoretical chlistic studies have placed them, on the contrary, in the Lumbricina suborder of the Haplotaxida order, but this may again soon change.

The larger groundworm worms are also called megadriles (or large worms), as opposed to microdriles (or small worms) in Tuberculic semicancic families, Lumbriculidae, and Enchytraeidae, among others. Megadriles are characterized by having a different clitorus (wider than microdriles) and a true capillary vascular system.

Earthworms are much more abundant in disturbed environments and are usually active only if water is present.