Animales simples: gusanos

The video tutorial explores the diversity of worms, focusing on three major groups: flatworms, earthworms, and segmented worms. Flatworms, or tlatelmintos, have a more advanced nervous system and exhibit bilateral symmetry. Earthworms, also known as nematodes, possess a one-way digestive system. Segmented worms, or annelids, have segmented bodies and a closed circulatory system. The video also highlights the unique characteristics of leeches, a type of annelid that feeds on blood.

What is a unique feature of flatworms that distinguishes them from other worms?

• They have a closed circulatory system.

• They are known for their elongated, round bodies.

• They possess bilateral symmetry.

• They have a segmented body.

Which of the following best describes the digestive system of nematodes?

• A two-way digestive system.

• A one-way tube where food enters and waste exits from the same side.

• A digestive system with multiple entry and exit points.

• A one-way tube where food enters from one side and waste exits from the opposite side.

What is a characteristic feature of segmented worms?

• They have a two-way digestive system.

• They lack a circulatory system.

• Their bodies are made up of segments.

• They have a simple nervous system.

Which type of worm is known for having a closed circulatory system?

• Flatworms

• Nematodes

• Annelids

• Planaria

Leeches, a type of annelid, are known for feeding on what?

• Blood of other animals

• Plant material

• Soil nutrients

• Algae