Identify the following internal earthworm structures: #2

Identify the following internal earthworm structures: #3

Identify the following internal earthworm structures: #4

Identify the internal structures of the clam: #5

Identify the internal structures of the clam: #6

Identify the internal structures of the clam: #7

Identify the internal structures of the clam: #8

The two annelid subclasses containing the earthworms and the leeches have now been united into the class

Recent evidence suggests that annelids share common ancestry with

Pigment cells of cephalopods are called

The major nitrogenous waste produced by annelids is

The only living cephalopods that possess an external shell are the

_______________________ is the segmental arrangement of body parts.

External respiratory exchange in most annelids is accomplished by

Which of the following is/are characteristics of the phylum Annelida?

The body cavity of most annelids is divided into compartments by "curtains" of tissue called

Some segmented animals have groups of segments specialized for particular functions. The process of forming distinct body regions is called ____________________.

Polychaetes are distinguished by lateral extensions of the body called

The shell of a mollusc is secreted by the

The girdle-like structure used for mucus secretion during copulation (reproduction) in oligochaetes is the

The body of molluscs is divided into two main regions called the

During feeding, the _____________ of oligochaetes helps to pump in food.

Structures in earthworms that are sites for maturation and storage of sperm prior to their release are called _______________ ________________.

In some gastropods, a(n) ______________ is found on the dorsal, posterior margin of the foot and when the foot is drawn into the shell, seals the opening.

Squids, octopuses, cuttlefishes, and nautili belong to the molluscan class

The circulatory system of most molluscs is

In bivalves, gas exchange takes place through the ___________________.

Snails, slugs, and limpets belong to the molluscan class

Earthworm reproduction may be characterized by