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🚨 The 2026 MATURA REVIEW COURSE is available here: https://luzchemia.pl/sklep/ 🚨 Support my work by buying me a cup of coffee here: https://www.buymeacoffee.com/imagobio... Thank you! Hello everyone! The fourth video on our channel is about chordates. We invite you to systematize your basic knowledge of this extensive group of animals and ask any questions in the comments or on our social media: Facebook: https://bit.ly/2ybNqss Instagram: https://bit.ly/2ybFuah Thank you for all your support.