Download Chapter 10 The Triploblastic, Acoelomate Body Plan

 Rhabdites
are rodlike cells that swell
and form a protective mucous sheath
around the body, possible it respond to
attempted predation or desiccation.
 Releaser gland secrete a chemical that
dissolve the attachment as needed
 Numerous,
fine side branches of the
tubules originated in the parenchyma
as tiny enlargement called flame cells
 The tubules eventually merge and
open to the outside of the body wall
through a minute opening called a
nephridiopore
 Two
or more animals that result from
fission are called zooids, and they
regenerate missing parts after
separating from each other
 A hard capsule called a cocoon
 A few turberllarians have a free
swimming stage called a Muller larva
 Ten
thousand species of parasitic
flatworms in the class Trematoda are
collectively called flukes, which
describes their wide, flat shape.
 A large oval holdfast organ called the
opisthaptor.
 The
anterior sucker is called oral
sucker and surround the mouth
 The other sucker, the acetabulum is
located below the oral sucker on the
middle portion of the body
 Most
adult tapeworm consist of a long
series of repeating unit called
proglottid