GCSE Biology - The Circulatory System | The Blood (2026/27 exams) скачать в хорошем качестве

GCSE Biology - The Circulatory System | The Blood (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ ** WHAT'S COVERED ** 1. The Four Main Components of Blood Red Blood Cells White Blood Cells Platelets Plasma 2. Red Blood Cells (RBCs) Function in oxygen transport (haemoglobin and oxyhaemoglobin). Adaptations: No nucleus, biconcave shape. 3. White Blood Cells Role in the immune system and defending against infection. Defence mechanisms: Phagocytosis, producing antibodies, producing antitoxins. Presence of a nucleus. 4. Platelets Structure (cell fragments, no nucleus). Function in blood clotting. Importance of clotting (preventing blood loss and infection). 5. Plasma Composition and appearance. Role in making blood flow. Transport functions (carrying cells, nutrients, waste products, hormones, proteins, antibodies, antitoxins). 6. Replacing Blood Need for blood replacement due to significant blood loss. Artificial blood (saline solution): Benefits (volume) and limitations (no RBCs). Blood transfusion: Using donated real blood, benefits (contains RBCs). ** CHAPTERS ** 0:00 Intro & 4 Components of Blood 0:25 Red Blood Cells 1:28 White Blood Cells 2:16 Platelets 2:54 Plasma 3:31 Replacing Blood 3:54 Artificial Blood 4:21 Blood Transfusion ** PLAYLISTS **    • GCSE Maths (9-1)      • GCSE Biology (9-1)      • GCSE Chemistry (9-1)      • GCSE Physics (9-1)      • A-Level Biology   #GCSE #Biology #study