Phylum Annelida | Class 11 Biology | Chapter 1 | Lecture 10 | New Book 2025 | By Sabahat Mansha

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In this lecture, we dive deep into Phylum Annelida – the segmented worms of Kingdom Animalia.

🔍 What You’ll Learn in This Lecture:
✅ Key features of Annelida – Bilateral symmetry, Triploblastic, Protostome coelomates
✅ Segmentation – External rings & internal septa (Metameric Segmentation)
✅ Body wall & tube-like digestive system (crop, gizzard, intestine)
✅ Closed circulatory system with pseudo heart
✅ Excretion via metanephridia
✅ Skin-based respiration (cutaneous)
✅ CNS – Double, longitudinal nerve cord
✅ Locomotion via Setae (bristles)
✅ Reproduction – Hermaphroditic (Earthworm) & Unisexual (Nereis)
✅ Detailed whiteboard diagrams – General structure of Annelid (Earthworm)

📚 Based on the updated 2025 syllabus of Punjab Board Class 11 Biology

📺 Watch the COMPLETE CHAPTER PLAYLIST here:👉    • Three Domain Classification System | Domai...  

🎯 Ideal for: Board exams, MCQs prep, concept clarity & visual revision

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