Join the Amoeba Sisters in exploring some general animal characteristics, major vocabulary used in classifying animals (such as symmetry, protostome vs deuterostome, cephalization, and coelom), and take a general tour of 9 major animal...

Experiments conducted by Hilde Mangold and Hans Spemann taught us how an animal develops from a small ball of cells into an organism with distinct, functioning parts. The work was a foundational contribution to the field of developmental...

Salps are more than just strange balls of goo drifting through the sea—in fact, they’re more closely related to us than they are to jellyfish, and play a huge role in marine ecosystems and the global carbon cycle as the “vacuum cleaners...

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...

The salp's seemingly simple body hides a surprisingly complex life history that involves cloning itself, changing sex, and fighting climate change through the power of poop.<br/>

We have now completed our study of every single animal phylum but one: Chordata. This is the one that contains humans, as well as the most common animals we interact with every day, like our pets. There are about 81,600 species of...

Many people presume that all members of Chordata have a backbone, but that actually is not true. Vertebrates have backbones, meaning members of subphylum Vertebrata. There are two other subphyla within Chordata, those being...

Animals that at least at some stage in their development possess a stiff, rod-like structure running along their back, called a notochord.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60...

Biological Classification Set: This clip introduces the phylum of Chordata and the three subphyla of animals of which it is composed

Biological Classification Set: This clip introduces the eight classes of animals that make up the subphylum vertebrata.