Introduction to Echinoderms

The video tutorial explores the characteristics and features of echinoderms, a phylum that includes starfish, sea urchins, sea cucumbers, and sand dollars. It explains the origin of the term 'echinodermata' from Greek, meaning 'spiny skin.' The tutorial highlights the differences between echinoderms and arthropods, focusing on their internal skeleton and radial symmetry. It also describes the water vascular system, which aids in locomotion and feeding. Finally, it mentions the diversity of echinoderms, with around 6,000 species primarily inhabiting ocean environments.

What is the meaning of the term 'echinodermata'?

• Spiny skin

• Colorful skin

• Smooth skin

• Soft skin

Which of the following is NOT an example of an echinoderm?

• Sand dollar

• Jellyfish

• Sea urchin

• Starfish

How do echinoderms differ from arthropods?

• They have bilateral symmetry

• They have an external skeleton

• They possess radial symmetry

• They live on land

What is the function of the water vascular system in echinoderms?

• To provide camouflage

• To protect the body

• To produce light

• To conduct food, water, and gases

Approximately how many living species of echinoderms exist?

• 6,000

• 3,000

• 1,000

• 10,000