Vertebrate

The video tutorial introduces vertebrates, animals with an internal skeleton and backbone, and explains their classification into five classes: mammals, reptiles, amphibians, birds, and fish. Each class is described with examples and characteristics. The video also touches on invertebrates, animals without a backbone, highlighting insects as an example. It concludes with a question encouraging viewers to think about why vertebrates typically grow larger than invertebrates.

How do amphibians differ from reptiles?

What is the main difference between vertebrates and invertebrates?