Movement
Some platyhelminthes move by means
of cilia that cover the body, and some
move by the contraction of muscles.
Respiration
There is no specialized organ.
Respiration occurs by a process of diffusion.
Protection
There are three tissues layers:
ectoderm, mesoderm, and endoderm.
Support
There is no skeleton.
There is no skeleton.
Circulation
Circulation made possible by no
specialized organ. The body of the
flatworm flattens and there is diffusion.
Reproduction
Reproduction is hemaphroditic, that is,
both male and female organs create sperm,
which are exchanged between two individuals.
A shell is excreted that encloses the embroyo and
yolk. Early development occurs in the uteri.
Pinegreenwoods Montessori
Montessori Zoology
