Foot

Definition

The foot is a muscular structure found in many molluscs, used primarily for locomotion and anchorage. Its shape and function can vary significantly across different species within this phylum.

5 Must Know Facts For Your Next Test

1. In gastropods, like snails, the foot is a broad, flat structure that allows for a gliding motion.
2. Cephalopods, such as octopuses, have evolved their foot into a series of arms and tentacles.
3. In bivalves like clams, the foot is typically adapted for burrowing into sediment.
4. The foot in chitons is used to cling tightly to rocky surfaces in intertidal zones.
5. The development and adaptation of the foot are key factors in the diversification of molluscan species.

Review Questions

• How does the structure of the foot differ between gastropods and cephalopods?
• What is the primary function of the foot in bivalves?
• Why is the adaptation of the foot significant in understanding molluscan diversity?

Related terms

Mantle: A significant part of a mollusc's anatomy that secretes the shell and forms a cavity essential for respiration and excretion

Radula: A tongue-like organ with chitinous teeth used by many molluscs to scrape or cut food before ingestion

Siphon: A tubular organ through which water flows; used for feeding, respiration, or locomotion in various aquatic molluscs