Introduction and composition of blood and their function - scoopremarks

Introduction and composition of blood and their function


blood cells


  •  Blood is a fluid connective tissue  which is responsible for the connection between two or more organs and integrate the body .
  •  Blood content  in our body is upto  6 liters  .
  •  The ph of blood is 7.4  i.e. it is  slightly alkaline .
  •   The blood has a specific gravity of 1.055.
  •  The density of blood is slightly greater as compared to water.


  • Oxygen transportation by Red Blood Cells.
  •  Nutrition transport : It supplies nutrients to different organs from the digestive system.
  •  Hormones (secreted by endocrine glands) and other substances (secreted by other organs).
  •  Redistribution of H20 : responsible for maintenance of water balance in the body.
    (transport water from one tissue to other )
  •   Blood helps in the protection from different disease because it contain immunity and resistance.
  •  Reduce blood loss through cuts by clotting substance. Platelets
  •   Blood helps in removal of waste products .


  • Plasma contributes the major part in composition of blood.
  • Besides plasma the other composition like  Red Blood Cells , White Blood Cells , and Platelets  are also present in them.
  • The plasma of the blood also contains   Antibodies , hormones , protein , other organic and inorganic substances in them.
  • Plasma of blood  contains 91% of H2O and some important tissue .
  • Plasma proteins  are  important proteins  which are also  called blood protein.
  • Example : 1. Albumin
    2. Globulin
    3. Fibrinogen


    1.  ALBUMIN :-

  • Albumin are  found in highest concentration in plasma.
  • They  are referred  to as   cheap blood protein that are  produced in Liver.


  • Albumin maintains the Osmotic Pressure and viscosity of blood . Osmotic pressure is necessory to prevent the loss of various nutrients , which maintains extracellular fluid.
  • Albumin transport various substances .e.g iron ,hormone, urine etc.
  • Albumin binds with the particular substance and transport from one organ to other.


  •  Globulin are produced by Lymphoid tissue .
  • There main function is to protect body from infection and microorganisms .(alpha globulin)
  • These are three types of globulin.
    1. alpha globulin
    2. beta globulin
    3.  gama globulin


  • Fibrinogen are  generally present in inactive form.
  • Its main function is blood clotting .
  • During bleeding fibrinogen gets activated and prevent clotting.


  • Transport of substance albumin .
  • Maintenance of osmotic pressure and viscosity of blood .
  • Blood clotting Fibrinogen .
  • Resistance from impurities and microbes.


  • Centrifugation is a technique which involves the application of centrifugal force to separate particles from a solution according to their size, shape, density etc .
  • If we rotate two substances  at a very high speed then substances having higher  density will get collected into lower part .


Blood plasma is a yellowish coloured liquid component of blood that normally holds the blood cells in whole blood in suspension; this makes plasma the extracellular matrix of blood cells. It makes up about 55% of the body’s total blood volume.


Blood  Serum does not contain white or red blood cells or a clotting factor. It is the blood plasma without the fibrinogens it  includes all proteins not used in bloodclotting (coagulation) and all the electrolytes, antibodies, antigens, hormones, and any extra substances (such as drugs and microorganisms)




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