Translocation of Food in Plants | Structure of Phloem & Pressure Flow Theory | Class 11 Bio PTB 2025 скачать в хорошем качестве

Translocation of Food in Plants | Structure of Phloem & Pressure Flow Theory | Class 11 Bio PTB 2025

Translocation of Food in Plants | Class 11 Biology New Book 2025 | Yousuf Biology Academy In this video, we explain the complete process of Translocation of Food in Plants, including the Structure of Phloem, its components, and the Pressure-Flow (Mass Flow) Theory according to the Punjab Textbook Board (PTB) 2025. You will learn: ✔ What is Phloem? ✔ Components of Phloem (Sieve Tubes, Companion Cells, Parenchyma, Fibres) ✔ Mechanism of Translocation ✔ Why passive theories are rejected ✔ Pressure-Flow Theory by Ernst Münch ✔ Step-by-step movement of sucrose from source to sink This lecture is explained in simple language with headings to help Class 11 students understand the concept clearly and prepare for board exams. 📚 Chapter: Plant Physiology 📘 Book: Class 11 Biology (PTB 2025) 🎓 Teacher: Muhammad Yousuf 🎥 Channel: Yousuf Biology Academy If you find this video helpful, don’t forget to LIKE, SHARE, and SUBSCRIBE for more Class 11 Biology lectures. #BiologyClass11 #PTB2025 #Phloem #Translocation #PressureFlowTheory #PlantPhysiology #YousufBiologyAcademy #FScBiology #FoodTransportInPlants #MassFlowHypothesis #StructureOfPhloem Main Keywords: Translocation of Food in Plants Structure of Phloem Class 11 Phloem components PTB 2025 Pressure Flow Theory Class 11 Mass Flow Hypothesis Biology Food transport in plants Phloem function class 11 biology Plant Physiology Chapter 08 Phloem sieve tube elements Source and sink in plants PTB 2025 biology new book Yousuf Biology Academy lecture Supporting Keywords: Plant translocation easy explanation Companion cells and sieve tubes Osmosis in phloem transport Active loading and unloading of sucrose Mechanism of phloem transport Diffusion vs pressure flow theory FSc Part 1 Biology Chapter 8 Class 11 biology Urdu explanation Food movement in plants Translocation short notes Timeline / Chapters: 00:00 — Introduction to Translocation of Food 00:25 — What is Phloem? (Simple explanation) 01:10 — Location of Phloem in Plants 01:45 — Components of Phloem 01:55 — Sieve Tube Elements 03:10 — Companion Cells 04:05 — Phloem Parenchyma 04:50 — Phloem Fibres 05:25 — Mechanism of Translocation 06:00 — Why Passive Theories are Rejected 06:40 — Diffusion Theory (Simple Explanation) 07:20 — Pressure-Flow Theory (Mass Flow Hypothesis) 08:00 — Source: Formation of Sucrose 08:40 — Loading of Sucrose into Phloem 09:20 — Water entering Sieve Tubes 10:00 — Unloading at Sink 10:40 — Flow of sugar from source to sink 11:20 — Summary & Final Concept Revision 12:00 — Outro (Like, Share, Subscribe)