Blood

Cards (6)

  • Blood is liquid tissue that transports oxygen and other substances dissolved in it
  • Blood contains:
    • Plasma
    • Red blood cells
    • White blood cells
    • Platelets
  • Plasma
    • a liquid that carries the components in the blood
    • includes : red and white blood cells, platelets, glucose, amino acids, carbon dioxide, urea, hormones, proteins, amino acids, antibodies and antitoxins
  • Red blood cells
    • carry oxygen molecules from lungs to all cells in the body
    • have a bioconcave disc shape, which provides large surface area
    • no nucleus, more room to carry oxygen
    • contain haemoglobin, which binds to oxygen and forms oxyhaemoglobin
  • White blood cells
    • are a part of the immune system
    • have a nucleus
    • 3 different types : phagocytes and lymphocytes ( those that produce antibodies and antitoxins)
  • Platelets
    • help the blood clots form at wounds
    • clot dries and hardens to form a scab, which allows new skin to grow underneath
    • no nucleus
    • without them cuts would result in excessive bleeding and bruising
    • small fragments of cells