6. What is mechanical
digestion? In molluscs,
arthropods, earthworms, birds
and vertebrates, in general,
which organs respectively
participate in this type of
digestion?

Gap-fill exercise

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Mechanical digestion is
fragmentation of food by
specialized physical , such as
teeth, to extracellullar
digestion. mechanical
fragmentation of helps digestive
enzymatic because it provides
larger total area the contact
between and their substrates.

some molluscs,the mechanical
is done by radula (a
teeth-like ). Some arthropods,
like and dragonflies, have
that make mechanical
of food. In and
birds, the digestion is made
an internal muscular . In
mandibulate vertebrates are
mandibles and muscles to
triturate previous to the
digestion.