Ch. 33

Front

What is the water vascular system?

Back

A unique hydraulic system found in echinoderms, used for locomotion, feeding, and gas exchange.

Front

What are the main characteristics of the phylum Echinodermata?

Back

Echinoderms have a water vascular system, radial symmetry, and a calcareous endoskeleton.

Front

Define mantle in the context of Mollusca.

Back

A significant part of the anatomy of mollusks, the mantle is a layer of tissue that covers the internal organs and may secrete a shell.

Front

What is a radula?

Back

A specialized feeding structure found in mollusks, used to scrape food particles off surfaces.

Front

What are jointed legs and which phylum are they associated with?

Back

Jointed legs are a characteristic of arthropods, allowing for flexible movement.

Front

What is the significance of having a closed circulatory system?

Back

A closed circulatory system allows for more efficient transport of nutrients and oxygen to tissues compared to an open system.

Front

What defines the phylum Mollusca?

Back

Mollusca is characterized by a soft body, often protected by a hard shell, and includes organisms like snails, clams, and octopuses.

Front

What is the primary feature of the phylum Platyhelminthes?

Back

Platyhelminthes, or flatworms, are known for their flattened bodies and lack of a coelom.

Front

What is the role of muscles attached to an exoskeleton?

Back

They provide support and enable movement in arthropods, allowing for a wide range of motion.

Front

What is the importance of surface area in animal phyla?

Back

Increased surface area enhances gas exchange and nutrient absorption, crucial for survival in various environments.