Body Structure of Flatworms (Platyhelminthes)
STRUCTURE OF THE BODY Worms (Platyhelminthes)
flatworms (Platyhelminthes) have diverse body sizes. The size can be
microscopic to macroscopic with a length of 20 m as in the Taenia solium worm.
flatworms (Platyhelminthes) have a body that is bilateral symmetry ie the body
can be divided into two equal parts through a central plane.
flatworms (Platyhelminthes) are worms that are tripoblastic aselomata,
which are organisms that have 3 embryonic layers (ectoderm, mesoderm and
endoderm) and aselomata which means they do not have a body cavity. Mesoderm in
flat worms (platyhelminthes) does not experience specialization so that the
cells remain uniform and do not form special cells.
The digestive system of flatworms (platyhelminthes) is a gastrovascular
system, namely the circulation of food not through the blood but through the
intestine. The digestive system starts from the mouth, pharynx, and then the
esophagus. In addition, this worm does not have an anus, so the remaining food
is released by mouth. The nervous system is a nervous system of rope ladders.
In high-level flat worms (platyhelminthes) the nervous system is composed of
neuron cells which are then subdivided into sensory nerve cells, motor nerve
cells and association cells (intermediaries).
picture Body Structure of the Platyhelmintes
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