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Red Bone Marrow: The Body's Blood Factory Introduction *Visual: cross-section of a long bone.* Narration: "Inside your bones is soft, spongy tissue called bone marrow. Red bone marrow is the part that makes your blood cells." *Visual: close-up of red, spongy tissue.* Narration: "Red bone marrow, also called myeloid tissue, is a highly vascular tissue found in the spaces of spongy (cancellous) bone. Its red colour comes from the large number of blood vessels and developing red blood cells." **Scene 3: Function, hematopoiesis (25 sec)** *Visual: a stem cell splitting into RBCs, WBCs and platelets.* Narration: "Red marrow contains hematopoietic stem cells. These develop into red blood cells, which carry oxygen, white blood cells, which fight infection, and platelets, which help blood clot. This process is called hematopoiesis. An adult body makes millions of new red blood cells every second. *Visual: skeleton with highlighted areas.* Narration: "In chil...
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