An abscessed tooth is an infection within a tooth that has spread to the root tip or around the root. This infection originates from the tooth's inner chamber, which is called the pulp chamber.. Contained within the pulp chamber are blood vessels and nerves, collectively called the pulp..
Earthworms prefer to eat at night, though, rather than in the day. That is why they are also called nightcrawlers. Besides adding nutrients to the soil, earthworms keep the soil healthy by tunneling. Worms do not have claws or paws to make tunnels, but they do have mouths. As they eat (and eat and eat), they create tunnels that keep the soil open and full of paths for water and air.
This soil food web is the basis of healthy, living soil. Significant soil organisms involved in the soil food web include: 1) bacteria, 2) fungi, 3) protozoa, 4) nematodes, 5) arthropods, and 6) earthworms. 1  Bacteria â Bacteria are simple, single-celled microorganisms.2  Bacteria inhabit a wide variety of habitats, including soil. The bacteria contain more nitrogen than the protozoa can utilize and some ammonium (NH4) is released to plants. 2  Protozoa also prevent some pathogens from establishing on plants and function as a food source for nematodes in the soil food web. 3  Nematodes â Nematodes are small, unsegmented round worms.