Name the components of the formed elements in the blood and
mention one major function of each of them.
The component elements in the blood are:
They are the most abundant cells and contain the red pigment
called haemoglobin. They carry oxygen to all parts of the body.
Red blood cells are produced continuously in some parts of the
body such as the marrow of long bones, ribs, etc. There are about
4 - 6 million RBCs per cubic millimetre of
Leucocytes are colourless cells. These cells do not contain
haemoglobin. They are the largest cells of the body and are
divided into two main categories.
These leucocytes have granules in their cytoplasm and include
neutrophils, eosinophils, and basophiles. Neutrophils are
phagocytic cells that protect the body against various infecting
agents. Eosinophils are associated with allergic reactions, while
basophiles are involved in inflammatory responses.
Lymphocytes and monocytes are agranulocytes. Lymphocytes generate
immune responses against infecting agents, while monocytes are
phagocytic in nature.
Platelets are small irregular bodies present in blood. They
contain essential chemicals that help in clotting. The main
function of platelets is to promote clotting.
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