Sponges: Origins

Sponges often don’t even look alive, but an ancient sponge was actually the first animal.

Tags: cell to cell communication, choanocyte, filter feeding, reproduction, spicules, sponges
length: 14:02
Cnidarians: Life on the Move

These simple creatures invented movement.

Tags: anemone, cnidarian, feeding, jellyfish, medusa, nematocyst, origins, polyp, predation, stomach, tentacle, toxin
length: 14:43
Flatworms: The First Hunter

Flatworms look simple but they were the first animals with a distinct head with stereo senses.

Tags: bilateral, central nervous system, cilia, eggs, flatworms, hermaphroditic, hunter, internal fertilization, pharynx, planaria, reproduction, stereo senses
length: 9:54
Annelids: Powerful and Capable Worms

Annelid worms have incredibly diverse ways of making a living.

Tags: annelid, burrowing, central nervous system, feeding, leech, mud flat, segmentation, setae, worm
length: 13:38
Marine Arthropods: A Successful Design

The incredible diversity and dominance of arthropods in the ocean can be attributed to their extraordinarily adaptable body plan.

Tags: arthropod, exoskeleton, jointed appendages, marine, segmentation
length: 9:28
Terrestrial Arthropods: The Conquerors

Arthropods are all around us. They came onto land from the ocean and conquered the earth and the air.

Tags: arthropod, dragonfly, jointed appendages, land invasion, predation, spider, trachea
length: 13:41
Molluscs: The Survival Game

Molluscs have been masters in the survival game of life, evolving with new opportunities and new challenges.

Tags: abalone, camouflage, chromatophore, feeding, foot, jet propulsion, mantle, mollusc, nautilus, octopus, predation, squid, tentacle
length: 15:08
Echinoderms: The Ultimate Animal

Echinoderms show us that animals radically different from us, even ones without a brain, can be ultimately successful.

Tags: echinoderm, feeding, hydraulic, predation, sea cucumber, sea star, sea star feeding, sea urchin, starfish, stomach
length: 13:54
Chordates: We’re All Family

An obscure worm-like animal called Amphioxus teaches us about our relatives.

Tags: amphioxus, backbone, chordate, genes, gill slits, nerve chord, notochord, vertebrate
length: 15:43
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