Blood

• Blood is a tissue consisting of plasma, in which the red blood ells, white.blood cells, and platelets are suspended.
• Red blood cells carry oxygen from the lungs and deliver it throughout our body
• Red blood cells transport waste such a s carbon dioxide back to the lungs to be exhaled.
• Red blood cells can carry oxygen due to a protein called haemoglobin
• White blood cells help to defend against bacteria by ingesting them.
• White blood cells ingest bacteria in a process called phagocytosis
• Related risks include transmission od disease via blood