WebPeristomium. The peristomium is the first true body segment in an annelid worm's body in the anterior end. It is directly behind the prostomium and contains the mouth, tentacular cirri, and sometimes feeding palps, which may instead occur on the prostomium. If an eversible pharynx is present, it is contained in this segment as well, and can ... Webcommon name: earthworm scientific name: suborder Crassiclitellata, cohort Terrimegadrili (Jamieson, 1988) ... Below the peristomium is a region that, when the worm is relaxed, may be thicker than the posterior regions; this region contains the sexual organs and their related glands (Figure 3). Male and female paired genital pores on the ventral ...
Peristomium - Wikipedia
WebThe prostomium is the most anterior pre-segmental part of the body to the mouth, which may or may not be retractile and often bears antennae, eyes, tentacles, and palps. The … WebPeristomium : The first body segment in the earthworm is called the peristomium. It surrounds the mouth opening. Septal nephridium : They are present on both sides of intersegmental septa behind the 15th segment and they open into the intestine. Pharyngeal nephridium : They are present as three paired tufts in the fourth, fifth, and sixth segments. overflow pipe 中文
Peristomium - Wikipedia
WebThere is a small tongue-like lobe just above the mouth called the prostomium. Earthworms use the prostomium to see their environment, as earthworms have no eyes, ears, nose or … Web3. apr 2024 · Complete answer: The prostomium is a small fleshy lobe like structure that overhangs the mouth of the earthworm or acts as a covering for the mouth and its main … WebThe gastrointestinal tract of earthworms is a straight tube that runs from the worm's mouth to the anus. The peristomium (buccal segment) is the first body segment that contains the mouth and the final segment contains the anus. It is divided into two parts: an alimentary canal and accompanying glands, embedded in the wall of the alimentary canal. overflow pipe on water heater