Biology - Chapter 1 - Nutrition - part 18 (Digestion and enzymes) - Abdallah Reda el Sayed - YouTube

Biology - Chapter 1 - Nutrition - part 5 (Water pathway through the root) - Abdallah Reda el Sayed - YouTube

Biology - Chapter 1 - Nutrition - part 3 (Water absorption) - Abdallah Reda el Sayed

Biology - Chapter 1- Nutrition - part 1 (Introduction) - Abdallah Reda el Sayed

Biology - Chapter 1 - Nutrition - part 12 (Structure of the leave blade) - Abdallah Reda el Sayed - YouTube

Biology - Chapter 3 - Respiration - part 4 (Krebs cycle) - Abdallah Reda El Sayed

Biology - Chapter 2 - Transport - part 14 (Pulmonary circulation) - Abdallah Reda El Sayed

Biology - Chapter 3 - Respiration - part 4 (Electron transport chain) - Abdallah Reda El Sayed - YouTube

Biology - Chapter 3 - Respiration - part 5 (Anaerobic respiration) - Abdallah Reda El Sayed - YouTube

Biology - Chapter 3 - Respiration - part 3 (Glycolysis) - Abdallah Reda El Sayed

7 Biology - Chapter 4 - Excretion in plants - Abdallah Reda el Sayed

6 Biology - Chapter 4 - The artificial kidney (hemodialysis) - Abdallah Reda el Sayed - YouTube

Biology - Chapter 3 - Respiration - part 1 (Cellular respiration) - Abdallah Reda El Sayed

Biology - Chapter 3 - Respiration - part 6 (Respiratory system in man) - Abdallah Reda El Sayed - YouTube

Biology - Chapter 3 - Respiration - part 2 (Mitochondria structure) - Abdallah Reda El Sayed - YouTube

Biology - Chapter 3 - Respiration - part 8 (Gaseous exchange in plants) - Abdallah Reda El Sayed - YouTube

Biology - Chapter 2 - Transport - part 6 (Discovery of phloem structure) - Abdallah Reda el Sayed

Biology - Chapter 3 - Respiration - part 7 (Mechanism of respiration) - Abdallah Reda El Sayed - YouTube

Biology - Chapter 3 - Respiration - part 9 (Non green parts of the plant) - Abdallah Reda El Sayed - YouTube

8 Biology - Chapter 4 - Transpiration - Abdallah Reda el Sayed

3 Biology - Chapter 4 - The nephron - Abdallah Reda el Sayed