Crash Course
Chordates - CrashCourse Biology
Hank introduces us to ourselves by taking us on a journey through the fascinatingly diverse phyla known as chordata. And the next time someone asks you who you are, you can give them the facts: you're a mammalian amniotic tetrapodal...
Ancient Lights Media
Biological Classification - The Eight Classes of the Subphylum Vertebrata
Biological Classification Set: This clip introduces the eight classes of animals that make up the subphylum vertebrata.