Earthworms and Slugs Move by

question 58

Multiple Choice

Earthworms and slugs move by

• A) contracting their cilia.
• B) alternating contractions of longitudinal and circular muscles.
• C) contracting extensor and flexor muscles attached to their endoskeleton.
• D) stretching their longitudinal muscles and contracting their circular muscles.

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Definitions:

Serosa

Another term for serous membrane, the smooth tissue lining certain internal cavities of the body.

Chyme

The semi-fluid mass of partly digested food that moves from the stomach to the small intestine.

Enamel

The hard, protective outer layer of the tooth, made primarily of minerals and the hardest material in the human body.

Cementum

A specialized calcified substance covering the root of a tooth.