Structure of Skeletal Muscle | Class 11 Biology PTB & Class 12 Federal Board | Explanation 2025

📘 Topic: Structure of Skeletal Muscle 🎯 Class: 11 (Punjab Textbook Board) & 12 (Federal Board 2025) 👨‍🏫 Teacher: Yousuf Biology Academy 📅 Syllabus Year: 2025 In this video, we’ll study the detailed structure and organization of skeletal muscles, focusing on all important points from Punjab Textbook Board Class 11 Biology and Federal Board Class 12 Biology (2025 syllabus). You’ll learn: ✅ What are skeletal muscles and their functions ✅ Structure of a muscle fiber (sarcolemma, sarcoplasm, myofibrils) ✅ Difference between actin and myosin filaments ✅ Sarcomere — the functional unit of muscle contraction ✅ Bands and zones (A-band, I-band, H-zone, Z-line, M-line) ✅ Concept of striations and multinucleated cells ✅ Microscopic and ultrastructure details (for board exams) 💡 Perfect for: MDCAT aspirants FSc Pre-Medical students Class 11 & 12 board exam preparation 📖 Watch till the end to understand all key diagrams and short questions important for exams. 🔔 Subscribe to Yousuf Biology Academy for more lectures from Class 11 & 12 Biology (PTB & Federal Board 2025). 🔖 Hashtags: #YousufBiologyAcademy #Class11Biology #Class12FederalBoard #SkeletalMuscle #BiologyLecture #FScBiology #MDCAT2025 #MuscleStructure #PunjabTextbookBoard #Biology2025