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See all on WikipediaProstomium - Wikipedia
The prostomium (From Ancient Greek, meaning "before the mouth"; pl.: prostomia; sometimes also called the "acron") is the cephalized first body segment in an annelid worm's body at the anterior end. It is in front of (but does not include) the mouth, being usually a small shelf- or lip-like extension over the dorsal … See more
There may be three antennae present: a pair of lateral antennae and one median antennae. These are most commonly simple, tapering structures, but they may also be articulated or … See more
Wikipedia text under CC-BY-SA license Prostomium - Wikipedia
WEBHet prostomium [1] of acron [1] is een uitgroeisel van de monddelen van bijvoorbeeld regenwormen. Het ziet er op het eerste gezicht uit als het voorste segment, maar het is …
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Annelid - Wikipedia
In addition to Sipuncula and Echiura, also lineages like Lobatocerebrum, Diurodrilus and Polygordius have lost their segmentation, but these are the exceptions from the rule. Most of an annelid's body consists of segments that are practically identical, having the same sets of internal organs and external chaetae (Greek χαιτη, meaning "hair") and, in some species, appendages. The frontmost and rearmost sections are not regarded as true segments as they do not contain …
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Prostomium – Wikipedia
WEBDas Prostomium ( altgriechisch πρό pró ‚vor‘ und στόμα stóma ‚Mund‘ [1] ), auch Acron oder Kopflappen genannt, ist die Bezeichnung für die Körperspitze der Ringelwürmer …
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Peristomium - Wikipedia
WEBThe 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 …
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Gewone regenworm - Wikipedia
WEBBeschrijving. Ecologie. Levenswijze. Voortbeweging. Voortplanting. Toepassingen. Verspreiding. Cryptische soort. Gewone regenworm. Uiterlijk. verbergen. De gewone …
Regenwormen - Wikipedia
WEBDe ganglia liggen in het derde segment vlak voor het begin van de keel (farynx) aan de rugzijde (dorsaal) van de darm. Van daaruit gaan talrijke zenuwen naar de bovenlip of …
Lumbricus - Wikipedia
WEBKenmerken. Lumbricus. Uiterlijk. verbergen. Tot Lumbricus behoren enkele van de meest waargenomen regenwormsoorten in Europa. Tot het geslacht behoren ongeveer 700 …
Polychaete - Wikipedia
WEBEach body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. More than 10,000 species are …
Composition of the protocerebrum - Wikipedia
WEBsix3 is a transcription factor that marks the anteriormost part of the developing body in a whole host of Metazoa. [1] In the panarthropod brain, the anteriormost (rostralmost) part …
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