Earthworms exchange carbon dioxide through the walls of a complex respiratory tube system.

Leeches are parasitic segmented worms.

Squids move oxygen and nutrients through a closed circulatory system.

Mollusks have bilateral symmetry.

Mollusks are pseudocoelomates.

Which structure secretes the coating the produces the pearl in an oyster?

In the diagram above, what part is analogous (similar to) the central nervous system in humans?

In the diagram above, what part is analogous (similar to) the stomach in humans?

In the diagram above, what part is analogous (similar to) the kidneys in humans?

In the diagram above, what part is analogous (similar to) the throat in humans?

Which of the following structures help earthworms move?

Mollusks such as a squid or octopus move quickly by ejecting water out of which of the following structures?

Clams, oysters, and scallops are members of which class of mollusk?

Which structure PHYSICALLY breaks down food in an earthworms digestive tract?

The tentacles of a cephalopod are part of which structure?

Some marine segmented worms has parapodia modified to act as ____, like respiratory organs in fish.

Most annelids have a(n) ___ circulatory system

Herbivorous mullosks use a ____ to scrape algae off rocks.

The ____ of a mollusk surrounds the internal organs.