Cells
Our body is like a town, like Trichur. As the town is made
up of individual families, so is the body with its independent cells. Roads connect the
flats. Here the roads do this. Instead of trucks, Red Blood Corpuscles carry
food in the form of glucose and oxygen cylinders. The difference is that it is
one way traffic. Arteries go from the heart to the cells and veins come back,
with Carbon Dioxide. The smallest roads in the streets are called capillaries.
Each cell has birth, life and death. Maximum death is taking
place in the skins, the outer layer of which sheds dead cells in millions,
daily. Rub the body with the hands and
the dead cells fall off. AAs a family can survive for days, without food supply,
so can the cells live, even when the body breaths its last. It may take, up to
one month, for all cells to die.
Cells are specialized in their work, like carpenters,
goldsmith etc. Each group is called a ‘tissue’; hence the term ‘tissue culture’.
When the family splits, it makes extra house. When the cell
splits, it is broken into two, with the cell wall made in the centre. Each will
have its own ‘nucleus’, which is actually the governing body. Each chromosome is
a ‘department’.
As there are slums I the cities, so are the millions of
bacteria, permanently living in our intestines. Parasites like worms fungi tec.
too live in the intestines, causing diseases. Another group called ’virus’ can
be deadly, like the Ebola. Common cold, though not dangerous, cause maximum
loss of working ours. This virus changes every now and the and evade inoculation.
(to continue)
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