ตรวจสอบความถูกต้องของประโยคThe Earth worms are in Phylum Annelida. They are nocturnal animals and they lie in the burrows. The body of earth worm is long, slender, cylindrical and bilaterally symmetrical. Tiny curve bristles called “Setae”, it helps them can be moved by the action of muscles. The earth worm feeds on decrying organic materials contained in the soil. The digestive system runs as a straight tube from mouth, pharynx, esophagus, crop, gizzard, intestine and anus. The dorsal wall of the intestine is folded into the cavity as the typhlosole. It increases the absorptive area of the intestine. I love it.