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Blood GCSE Biology 91
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Download the perfect PowerPoint for this topic here: https://www.mrexham.com/igcse_biology... • 2.59 Describe the composition of the blood: red blood cells, white blood cells, platelets and plasma. • 2.60 Understand the role of plasma in the transport of carbon dioxide, digested food, urea, hormones and heat energy. • 2.61 Understand how adaptations of red blood cells make them suitable for the transport of oxygen, including shape, the absence of a nucleus and the presence of haemoglobin. • 2.62 Understand how the immune system responds to disease using white blood cells, illustrated by phagocytes ingesting pathogens and lymphocytes releasing antibodies specific to the pathogen. • 2.63B Understand how vaccination results in the manufacture of memory cells, which enable future antibody production to the pathogen to occur sooner, faster and in greater quantity. • 2.64B Understand how platelets are involved in blood clotting, which prevents blood loss and the entry of micro-organisms.
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