sentence: Annelids reproduce sexually by hermaphroditic cross-fertilization.
sentences_before: Annelids are made of one or more body segments. Each segment has one or more rings.
sentences_after: They can regenerate cut off pieces of their body. Unlike sponges, which can come back together if ripped apart. They have a hydrostatic skeleton, a one-way digestion system, and bilateral symmetry.
concept_name: annelid
headings: Annelid