notes of chapter Why do we fall ill
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Answers
Answer:
Introduction
Health
Health is a complete state of physical, mental and social well-being.
The Immune System
An immune system is the part of the body that provides protection against infection from pathogens, invading foreign substances and other toxins.
To know more about the Immune System, visit here.
Skin and Mucous Membranes
Skin and Mucous membranes act as the layer of defence. While skin protects the body externally, mucous membrane protects the insides of the body.
WBC
WBC- White blood cells are called Leucocytes or Leukocytes. They are the important components of our immune system and are present in the blood and lymph. They function by attacking and kill the pathogens and protect our body free from pathogens and infections. There are of different types of and are classified based on the location as well. The different types of White blood cells found in the blood are neutrophils, lymphocytes, monocytes, basophils, ad eosinophils. These blood cells have specialized functions.
Macrophages and NK Cells
Macrophages are large and specialized cells of the immune system. These cells are produced in response to infections or due to the development of damaged or dead cells. They attack cancer cells through destruction and ingestion. Natural Killer Cells bind to the enemy cell and they dissolve the membrane so the cell can’t function.
Dendritic Cells
Dendritic cells create the memory and carry information about the pathogens to the liver, spleen, lymph nodes.
Inflammatory Response
An inflammatory response is seen in the body when it gets injured or infected by a pathogen. Inflammations help in the localization of the issue and prevent it from spreading.
Answer:
here is the answer to your question
it may be caused due to the attack of pathogens (virus, bacteria), lack of nutritious diet/balanced diet and lack of public health services. The disease which lasts for only a short period of time is called Acute Disease. For example: Influenza (Flu), Common cold, etc. For example: TB, Cancer, etc
Explanation:
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