GCSE Biology - The Circulatory System | The Blood

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*** 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 ***










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