The odontophore underlies a chitinous feeding structure called the radula.
Members of this phylum use feather-like ctenidia in respiration. One order in this phylum has millimeter-wide axons, which Hodgkin and Huxley studied to discover action potentials. Conchiolin and chitin constitute the shells of these animals, which are derived from the dorsal body wall. The odontophore underlies a chitinous feeding structure called the radula. The body cavities of animals in this phylum are enclosed by the mantle. The muscular foot that characterizes members of this phylum gives rise to the tentacles in cephalopods. For 10 points, name this phylum which includes squid and hard-shelled oysters.
Members of this phylum use feather-like ctenidia in respiration.
Mollusca [or molluscs; prompt on “Cephalopoda” or “cephalopods”; prompt on “Bivalvia” or “bivalves”; prompt on “squid” or “giant squid” before “squid” is read] &lt;MJ&gt;