https://www.khanacademy.org/science/bmc-grade-10-science/x4e98504963be64d8:animal-classification/x4e98504963be64d8:platyhelmenthes/v/phylum-echinodermata 2025-11-24T15:30:41.675248313Z Phylum Echinodermata In this video, we dive into the extraordinary world of Phylum Echinodermata — home to starfish, sea urchins, sea cucumbers, brittle stars and feather stars! Imagine being able to grow back your hand if you ever lost it — that’s exactly what starfish can do, and that’s just one of the superpowers you’ll learn about. We explore why echinoderms are called “spiny-skinned” animals, how they slowly crawl on the ocean floor using tube feet, and how their incredible water vascular system helps them move, breathe, and even eat prey larger than their mouths. You’ll also understand how their symmetry changes as they grow, how they survive without a heart or brain, and how some species can reproduce through fragmentation — forming a whole new creature from just one arm! Perfect for anyone curious about marine life, this video breaks down everything from their triploblastic body layers to their unique digestion and respiration methods. By the end, you’ll see why echinoderms are some of the most amazing survivors of the sea, packed with adaptations that feel straight out of a fantasy world. Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Phylum Echinodermata In this video, we dive into the extraordinary world of Phylum Echinodermata — home to starfish, sea urchins, sea cucumbers, brittle stars and feather stars! Imagine being able to grow back your hand if you ever lost it — that’s exactly what starfish can do, and that’s just one of the superpowers you’ll learn about. We explore why echinoderms are called “spiny-skinned” animals, how they slowly crawl on the ocean floor using tube feet, and how their incredible water vascular system helps them move, breathe, and even eat prey larger than their mouths. You’ll also understand how their symmetry changes as they grow, how they survive without a heart or brain, and how some species can reproduce through fragmentation — forming a whole new creature from just one arm! Perfect for anyone curious about marine life, this video breaks down everything from their triploblastic body layers to their unique digestion and respiration methods. By the end, you’ll see why echinoderms are some of the most amazing survivors of the sea, packed with adaptations that feel straight out of a fantasy world. https://cdn.kastatic.org/ka-youtube-converted/zU4yrFvUBW8.mp4/zU4yrFvUBW8.mp4 460 Echinodermata & Hemichordata https://www.khanacademy.org/science/bmc-grade-10-science/x4e98504963be64d8:animal-classification/x4e98504963be64d8:hemichordata-and-urochordata/v/phylum-hemichordata 2025-12-07T09:40:46.599997909Z Phylum Hemichordata Dive into the fascinating world of Phylum Hemichordata—the “bridge” between non-chordates and chordates! In this video, we explore worm-like marine organisms, their unique stomochord, and why they aren’t considered true chordates despite their similarities. You'll learn about the following things about Hemichordates: ✔️ Habitat ✔️ Body structure, symmetry & germ layers and level of organization ✔️ Different organ systems ✔️ Fertilisation ✔️ Examples Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Phylum Hemichordata Dive into the fascinating world of Phylum Hemichordata—the “bridge” between non-chordates and chordates! In this video, we explore worm-like marine organisms, their unique stomochord, and why they aren’t considered true chordates despite their similarities. You'll learn about the following things about Hemichordates: ✔️ Habitat ✔️ Body structure, symmetry & germ layers and level of organization ✔️ Different organ systems ✔️ Fertilisation ✔️ Examples https://cdn.kastatic.org/ka-youtube-converted/vDyzhF5W8K0.mp4/vDyzhF5W8K0.mp4 276 Echinodermata & Hemichordata https://www.khanacademy.org/science/revision-term-1-od-grade-9-life-science/x26da6cb4aecf5718:week-1/x26da6cb4aecf5718:diversity-in-living-organisms/e/non-chordates-ii 2026-04-06T05:34:24.014119066Z Non chordates - II This exercise is about the phyla Arthropoda, Mollusca, and Echinodermata. Nivedhitha exercise