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What are the causes of diseases Class 9?

What are the causes of diseases Class 9?

Immediate cause: The organisms that enter our body and cause the disease are termed as an immediate cause. For example, virus, bacteria, protozoa etc. Contributory cause: The secondary factors which led these organisms enter our body are termed as a contributory cause.

What are the causes and capable causes of disease?

Microorganisms that are capable of causing disease are called pathogens.

What is disease Class 8?

Answer: A disease is a condition of disturbances in physical and psychological processes of the human body.

What are contributory causes?

A contributory cause of death is any cause of death that is neither the immediate, intervening, originating antecedent nor underlying cause; hence these are other significant conditions that contributed to the fatal outcome, but were not related to the disease or condition directly causing death.

How are diseases caused and prevented and cured?

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Prevention & Treatment

  1. Keep immunizations up to date.
  2. Wash your hands often.
  3. Prepare and handle food carefully.
  4. Use antibiotics only for infections caused by bacteria.
  5. Report to your doctor any rapidly worsening infection or any infection that does not get better after taking a course of antibiotics, if prescribed.

What is the cause of communicable disease?

Communicable, or infectious diseases, are caused by microorganisms such as bacteria, viruses, parasites and fungi that can be spread, directly or indirectly, from one person to another. Some are transmitted through bites from insects while others are caused by ingesting contaminated food or water.

What are diseases Class 9?

Answer. 138.6k+ views. Hint: Any disturbance in the structure or function of any organ or part of the body. It may be caused due to the attack of pathogens (virus, bacteria), lack of nutritious diet/balanced diet and lack of public health services.

What is the term disease?

disease, any harmful deviation from the normal structural or functional state of an organism, generally associated with certain signs and symptoms and differing in nature from physical injury. A diseased organism commonly exhibits signs or symptoms indicative of its abnormal state.

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What are immediate causes?

The final act in a series of provocations leading to a particular result or event, directly producing such result without the intervention of any further provocation.

What is third level cause of disease?

The third level causes of the disese are improper sanitation, unhealthy drinking water, etc which are nothing bit the unhygienic conditions.

How do viruses cause disease?

Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves. This can kill, damage, or change the cells and make you sick. Different viruses attack certain cells in your body such as your liver, respiratory system, or blood.

What are 5 infectious diseases?

Common Infectious Diseases

  • Chickenpox.
  • Common cold.
  • Diphtheria.
  • E. coli.
  • Giardiasis.
  • HIV/AIDS.
  • Infectious mononucleosis.
  • Influenza (flu)

What really causes disease?

The causes of heart disease vary by type of heart disease. Atherosclerosis is a process in which blood, fats such as cholesterol and other substances build up on your artery walls. Eventually, deposits called plaques may form. The deposits may narrow or block your arteries. These plaques can also rupture, causing a blood clot.

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What are infectious diseases and what causes them?

Bacteria. This is the primary reason for such diseases as strep throat,urinary tract infections and tuberculosis.

  • Viruses. Viruses are extremely small but can cause a wide range of diseases,ranging from the common cold to full blown AIDS.
  • Fungi. This is the cause of many skin diseases and conditions of ringworm and athlete’s foot.
  • Parasites.
  • What diseases are caused by cancer?

    About 14.1 million new cases occur a year (not including skin cancer other than melanoma). It caused about 8.8 million deaths (15.7\% of deaths). The most common types of cancer in males are lung cancer, prostate cancer, colorectal cancer and stomach cancer.

    What causes human disease?

    In this sense, it sometimes includes injuries, disabilities, disorders, syndromes, infections, etc. The most common cause of disease in humans is via pathogens; microorganisms such as viruses, bacteria, protozoa, and fungi that cause disease in humans and other species that enter the body in a number of ways.