Question

II. The Way Human Body Defends.
1x10-10one should have nutritious balanced diet because
1. The defence mechanism of human body is a gift of nature provided to human beings. The power of
our body to fight against various disease-producing agents is known as defensive mechanismi. This
defensive mechanism depends upon various factors which can be categorised mainly into two
types common factors and special factors.
2. Amongst the common luctors, the most important is the health of human beings. We all know il
we are having a good health, our body automatically remains protected against the diseases. For
keeping good health one should have nutritious balanced diet. A bulanced diet is that which
contains carbohydrates, fat, proteins, vitamins in proportionate amount.
3. The skin of our bouly waves us against many micro-organisms producing diseases, provided that it
is intact. In case there are cuts or abrusions on it, the micro-organisms pencirate the body through
those cuts and abrasions and can cause diseases. Therefore, a cut or an abrasion should never be
left open. In case there is no handage, etc. uvuilable, it may be covered by a clean cloth.
4. Some bacteria are residing on and inside the human body. They are our friends and are useful for
us. They do not cause any disease and by their presence they do not allow disease-causing
organisms to settle on those places. For example, the micro-organisms, present in human saliva
secrete a chemical which does not allow diphtheria causing bacteria to grow inside the oral cavity,
5. The human body secretes a variety of fluids, which are killers for disease causing micro-
organisms. For example, gastric juice (acidic in nature) secreted by our intestinal tract kills all
organisms which enter our body through food.
6. There are a few automatic activities of our body known as "reflex phenomenon" which protect the
body against many infections. This reflex phenomenon includes sneezing, coughing and vomiting.
7, Fever is one of the most important constituents of the defensive mechanism of our body. The organ
which regulates the temperature of our body is known as hypothalamus and it is situated in the
brain. When micro-organisms after entering the body relense toxic products and these reach the
brain through blood, the hypothalamus starts increasing the temperature of body the person gets
fever. This fever is very ucful for the human body because by the increase of temperature the
micro-organisms which are the root cause of the problem get killed.
8. We are living in an environment which is full of bacteria. Many of these bacteria cun produce
scrious diseases, but all of us do not suffer from such diseases. It is due to a special power present
in our body to fight these diseases. A part of this special power of our body is known as innate
immunity. This is inherited by us. The other part of this special power is called acquired immunity,
This we gain during our lifetime.
9. In a nutshell, we can say since nature has provided us with defensive mechanism to fight against so
many diseases, let us maintain it and rather increase it by the way of immunisation.
Answer the following questions by choosing the most appropriate option:
1. One should have mutritious balanced diet because
1. It has food items for various tastes 2. It keeps one healthy
3. It is recommended by a dietician 4. It has all essential items
b. The defence mechanism of human body is important as
1. It prolects us from diseases
2. It checks deterioration of body
3. It saves us from depression
4. Il builds up
the wear and teur​

Answer 1

Answer:

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