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Phylum Chaetognatha: Arrow Worms

The organisms in phylum Chaetognatha are known as arrow-worms, or bristle-jaws. They have a very interesting anatomy and eating habits. Their phylogeny is tricky and still in flux, so let's learn about what we know right now! Script by Ryan Helcoski and Dr. Carsten H G Müller: https://www.researchgate.net/profile/... Additional collaboration by Dr. Yvan Perez: https://www.researchgate.net/profile/... Handbook of Zoology: https://www.degruyter.com/database/zo... Watch the whole Zoology playlist: http://bit.ly/ProfDaveZoo General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem Biology Tutorials: http://bit.ly/ProfDaveBio Anatomy & Physiology Tutorials: http://bit.ly/ProfDaveAnatPhys Microbiology Tutorials: http://bit.ly/ProfDaveMicrobio Botany Tutorials: http://bit.ly/ProfDaveBotany EMAIL► [email protected] PATREON►   / professordaveexplains   Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience! Amazon: https://amzn.to/2HtNpVH Bookshop: https://bit.ly/39cKADM Barnes and Noble: https://bit.ly/3pUjmrn Book Depository: http://bit.ly/3aOVDlT