What Is Disease And Its Causes Class 9?

Answer. 112.2k+ 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 are causes of disease class 9th?

For example, dirty water, contaminated food, improper nourishment, poor standard of living, etc. For Example, Bacteria, Fungi, Viruses, Germs etc For Example Poor diet, Unhealthy lifestyle, Polluted environment etc. includes harmful microbes or microorganism such as bacteria, virus, fungi or protozoa.

What is disease and its causes?

Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They’re normally harmless or even helpful. But under certain conditions, some organisms may cause disease. Some infectious diseases can be passed from person to person.


What is disease Short answer?

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.

What is disease explain?

A disease is a particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not due to any immediate external injury. Diseases are often known to be medical conditions that are associated with specific signs and symptoms.

Are diseases curable?

Some diseases can be cured. Others, like hepatitis B, have no cure. The person will always have the condition, but medical treatments can help to manage the disease. Medical professionals use medicine, therapy, surgery, and other treatments to help lessen the symptoms and effects of a disease.

What are the two types of disease?

  • communicable , which are caused by pathogens and can be transferred from one person to another, or from one organism to another – in humans these include measles, food poisoning and malaria.
  • non-communicable , which are not transferred between people or other organisms.

What is acute and chronic disease Class 9?

Acute diseases are the diseases that affects an individual for short span of time. For example, typhoid, cold, cough etc. Chronic diseases are the diseases that persist for a long period of time. They develop over a time and does not appear suddenly. For example, Heart disease, kidney disease etc.

What do you mean by disease class 9?

A Disease is a condition which is abnormal and negatively affects the structure and functioning of organs or tissues or parts of a living organism. It has to be noted that it is not due to any immediate external injury and disease is a medical condition which has specific signs and symptoms.

What are the symptoms of diseases Class 9th?

  • Symptoms of Malaria: fever, nausea, muscle pain.
  • Symptoms of Typhoid: fever, loss of appetite, abdominal pain.
  • Symptoms of Dengue: high fever, pain behind eyes, skin rash.
  • Symptoms of Gerd: chest pain, difficulty in swallowing, a sensation of a lump in throat.

What are the 3 classifications of disease?

The most widely used classifications of disease are (1) topographic, by bodily region or system, (2) anatomic, by organ or tissue, (3) physiological, by function or effect, (4) pathological, by the nature of the disease process, (5) etiologic (causal), (6) juristic, by speed of advent of death, (7) epidemiological, and …

How many human diseases are there?

Jennifer Sherman, press secretary for the House Energy and Commerce Committee, pointed to an estimate published by the University of Michigan Medical School that “there are roughly 10,000 diseases afflicting humans, and most of these diseases are considered ‘rare’ or ‘orphan’ diseases.”

What is an example of an illness?

1 : an unhealthy condition of the body or mind Germs can cause illness. 2 : a specific sickness or disease Colds are a common illness.

What are the 4 types of infections?

The four different categories of infectious agents are bacteria, viruses, fungi, and parasites. When studying these agents, researchers isolate them using certain characteristics: Size of the infectious agent.

Which disease has no cure?

cancer. dementia, including Alzheimer’s disease. advanced lung, heart, kidney and liver disease. stroke and other neurological diseases, including motor neurone disease and multiple sclerosis.

What are the six diseases?

Number Other names for the disease Etiology(ies)
Fifth disease Erythema infectiosum Erythrovirus (Parvovirus) B19
Sixth disease Exanthem subitum, Roseola infantum, “Sudden Rash”, rose rash of infants, 3-day fever Human Herpes Virus 6B or Human Herpes Virus 7
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