FIG. 44.16 Annelids. (a and b) Earthworms typify the segmented body plan found throughout the Annelida. (c) The most diverse annelids are polychaete worms, which live in the oceans. (d) Leeches are specialized for ingesting blood from mammalian hosts. (e) Vestimentiferan worms live along hydrothermal rift vents in the oceans, gaining nutrition from chemosynthetic bacteria in specialized organs (red in the image).
Photo sources: a. Valerie Giles/Science Source; c. Alexander Semenov/Science Source; d. Volk, F/age fotostock; e. Susan Dabritz/SeaPics.com.