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BIOL - Composition of Blood 

Biology, | IB | IGCSE | GCE | AP Biology | HKDSE

· Biology,Blood cells,Platelets,Plasma,Immunity

Question: 2.57 Describe the composition of the blood, red blood cells, white blood cells, platelets and plasma 

Question: 2.58 understand the role of plasma in the transport of CO2, digestion,food, urea, hormones and heat energy 

Blood:

Supposedly, carries materials and heat around the body to the tissues , protecting against diseases.

Includes:

  • Red blood cells
  • White blood cells
  • Platelets
  • Plasma

Red Blood cell: Transports O2

White blood cell: Ingests pathogens and produces antibodies

Platelets: Majorly involved in blood clotting

Plasma: Transports CO2, digest food, hormones and heat

*Plasma is a straw-coloured liquid that makes up just over half the volume of blood*

tuttee, biology, Red blood cells, white blood cells, Plasma

Further explanation of Plasma:

  • Plasma is mainly composed of water and the water properties that makes it import is that it is a solvent and a fluid. 
  • Transportation of CO2: gets carried out in the plasma dissolved in a form of hydrogen carbonate ions and CO2
  • Digested food: (soluble sugars and amino acids), gets transported to the cells through plasma.
  • Waste molecules: (Urea in excretion) transports from the liver to the kidney dissolved in the plasma of blood. 

*Another property of water is that it excels at carrying heat so becomes important in maintaining body temperature.*

tuttee, biology, Red blood cells, white blood cells, Plasma

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