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A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

Blood has four main components:

  1. Plasma
  • Fluid part of blood
  • Carries carbon dioxide, hormones and waste

  1. Red blood cells
  • Contain haemoglobin which carries oxygen
  • Made in the bone marrow

  1. White blood cells
  • produce antibodies and destroy harmful microorganisms
  • Made in the bone marrow

  1. Platelets
    Clump together to form clots
    Protect the body by stopping bleeding

    Blood under the Microscope
    Red blood cells and white blood cells

Immune Cells Eating Bacteria (Phagocytosis)

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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