Phylum Arthropoda | Diversity in Living Organisms | Biology | Grade 9 | Telangana | Khan Academy
In this video, we explore the most successful and diverse group of animals on Earth — Phylum Arthropoda! From buzzing mosquitoes and colourful butterflies to mighty crabs and tiny lice, arthropods make up nearly 80% of all known animals. We’ll break down their body structure, including the iconic head–thorax–abdomen division, their protective chitinous exoskeleton, and their incredible jointed legs that allow them to walk, crawl, swim, and even fly. You’ll learn how arthropods breathe through gills, tracheae, or book lungs, how their open circulatory system works, how they remove waste using Malpighian tubules, and why their nervous system makes them so quick and responsive. We’ll also uncover how arthropods reproduce, and how many undergo dramatic metamorphosis — turning from caterpillars into butterflies and larvae into crabs! Perfect for students, teachers, and curious learners, this video explains why arthropods are truly nature’s greatest survivors." Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! (https://www.khanacademy.org/science/t...) Timestamps: 0:00 – Introduction to Arthropods 0:21 – Why Arthropods Are the Most Successful Animals 0:54 – Body Division: Head, Thorax & Abdomen 1:51 – Exoskeleton & Molting 2:19 – Basic Body Features: Triploblastic & Bilateral Symmetry 2:50 – Coelom & Organ System Level of Organization 3:03 – Complete Digestive System & Mouthpart Adaptations 3:31 – Open Circulatory System & Hemolymph 4:13 – Respiratory Organs: Gills, Trachea, Book Lungs 4:26 – Excretion Through Malpighian Tubules 4:47 – Nervous System & Fast Responses 5:04 – Movement Using Jointed Appendages 5:21 – Sexual Reproduction & Internal Fertilisation 5:36 – Metamorphosis 6:03 – Summary of Key Features Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate
