Section 2

objectives

• List the major characteristics of chordates.

• Describe the evolution and classification of invertebrate chordates.

• Describe the structure of lancelets.

• Describe the structure of tunicates.

vocabulary atriopore

Invertebrate Chordates e phylum Chordata (kawr-DAY-tuh) includes all of the vertebrates, or animals with backbones. It also includes two groups of invertebrates—animals that lack backbones.

figure 38-10

All chordates have a notochord, a dorsal nerve cord, pharyngeal pouches, and a postanal tail during at least some stage of their life.

Dorsal nerve cord

Was this article helpful?

0 0
Sirens Sleep Solution

Sirens Sleep Solution

Discover How To Sleep In Peace And Harmony In A World Full Of Uncertainty And Dramatically Improve Your Quality Of Life Today! Finally You Can Fully Equip Yourself With These “Must Have” Tools For Achieving Peace And Calmness And Live A Life Of Comfort That You Deserve!

Get My Free Ebook


Post a comment