Assertion: earthworm's segment | /r/MadeOf | the mouth
Facets:
Source sentences:
text: The first segment of a nightcrawler worm’s body contains the mouth.
text: Later they sink to the sea-floor and metamorphose into miniature adults: the part of the trochophore between the apical tuft and the prototroch becomes the prostomium (head); a small area round the trochophore's anus becomes the pygidium (tail-piece); a narrow band immediately in front of that becomes the growth zone that produces new segments; and the rest of the trochophore becomes the peristomium (the segment that contains the mouth).