Chapter 40 Basic Principles of Animal Form and Function
- Amazing Animal Superpowers | It's Okay to be Smart (8:02)
- Untamed Science: Crazy Animal Births (2:50)
- Comparative Anatomy: What Makes Us Animals - Crash Course Biology #21 (8:51)
- Simple Animals: Sponges, Jellies, & Octopuses - Crash Course Biology #22 (11:31)
- Complex Animals: Annelids & Arthropods - CrashCourse Biology #23 (13:15)
- Chordates - CrashCourse Biology #24 (12:10)