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*
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.*
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