Nematoda, Playhelminthes,

Front

What is the primary excretory structure in worms?

Back

Nephridia are the primary excretory structures in worms, responsible for removing waste from the body.

Front

Describe the body structure of roundworms.

Back

Roundworms have an elongated, cylindrical, unsegmented body that is bilaterally symmetrical and tapers at both ends.

Front

What parasitic worm can be contracted from contaminated soil?

Back

Hookworm is a parasitic worm that can be contracted from walking on contaminated soil.

Front

What are setae in the context of worms?

Back

Setae are stiff hairs or bristle-like structures on organisms, often used for locomotion.

Front

From which simpler animals did flatworms evolve?

Back

Flatworms evolved from Cnidaria, which includes jellyfish and corals.

Front

What is the main characteristic of the Nematoda phylum?

Back

Nematodes, or roundworms, are characterized by their elongated, cylindrical, and unsegmented bodies.

Front

What is the significance of nephridia in worms?

Back

Nephridia play a crucial role in excretion, helping to regulate the internal environment by removing metabolic waste.

Front

How do flatworms differ from roundworms in terms of body structure?

Back

Flatworms have a flattened body shape, while roundworms have a cylindrical and elongated body.

Front

What type of habitat do most nematodes inhabit?

Back

Most nematodes inhabit soil, freshwater, and marine environments, with many being free-living.

Front

What is a common feature of parasitic worms?

Back

Parasitic worms often have complex life cycles and may require multiple hosts to complete their development.