14. Sponge identitycard. How
are sponges characterized
according to example of
representingbeings, basic
morphology, type of
symmetry, embryonic (germ)
layers and coelom, digestive
system, respiratory system,
circulatory system, excretory
system, nervous system and
types of reproduction?

Gap-fill exercise

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Example of representing :
sponges. Basicmorphology: tubular
globular body with , sessile;
choanocytes, pinacocytes
amoebocytes. Type of : not
established. Germ and coelom:
do apply since poriferans not
have true organization. Digestive
system: . Respiratory
system: nonexistent.
system: nonexistent. Excretory :
nonexistent. Nervous system:
. Types of reproduction:
and sexual with stage.