-
hypothesis include:[citation needed] The
acoelomate theory,
which states that
coelom evolved from an
acoelomate ancestor. The
enterocoel theory,
which states...
- with a
separate mouth and ****. Some
bilaterians lack body
cavities (
acoelomates, i.e. Platyhelminthes,
Gastrotricha and Gnathostomulida),
while others...
-
Limnognathia maerski is a
microscopic acoelomate freshwater animal,
discovered living in cold
springs on
Disko Island, Greenland, in 1994.
Since then,...
- Wheeler, W. C. (2000). "Triploblastic
relationships with
emphasis on the
acoelomates and the
position of Gnathostomulida, Cycliophora, Plathelminthes, and...
-
three germ layers: ectoderm, endoderm, and mesoderm).
Their body plan is
acoelomate – they lack a
coelom – do not have a true body cavity. Also an excretory...
- is the most
important excretory organ. That is
particularly true for
acoelomate groups like cnidarians,
flatworms and nemerteans, who have no body cavities...
- or hairybacks, are a
group of
microscopic (0.06–3.0 mm), cylindrical,
acoelomate animals, and are
widely distributed and
abundant in
freshwater and marine...
-
spaces that
fills the
interior of the body of a flatworm,
which is an
acoelomate. This is a
spongy tissue also
known as a
mesenchymal tissue, in which...
-
endocrine system. Many of the
larvae are
acoelomate, with some
adults being pseudocoelomate, and some
remaining acoelomate.
Development is
generally direct,...
- body or
parasitic lifestyle. The
Platyhelminthes and
Gastrotricha are
acoelomate. The
other phyla have a pseudocoel, and
share characteristics such as...
