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However, the presence of the ampulla distributed these forces over a larger surface area, and lessened the risk of damage to the tooth under strain.
en.wikipedia.org It involves a reorientation of the head to align the posterior semicircular canal (at its entrance to the ampulla) with the direction of gravity.
en.wikipedia.org They have tentacle ampullae and respiratory trees present, a kind of water lung attached to the cloaca.
en.wikipedia.org Lateral canals run to both the tube feet and the large oral tentacles, all of which possess ampullae.
en.wikipedia.org The ampullae pores are plainly visible as dark spots in the skin.
en.wikipedia.org