What is the simple definition for 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.

What is disease in biology class 9?

Any condition which impairs health, or interferes with the normal functioning of the body is called disease.

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 Class 8?

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

What is health and disease?

A disease is a type of internal state which is either an impairment of normal functional ability, i.e., a reduction of one or more functional abilities below typical efficiency, or a limitation on functional ability caused by the environment. (4) Health is the absence of disease.

How are diseases formed?

Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. Disease, which typically happens in a small proportion of infected people, occurs when the cells in your body are damaged as a result of infection, and signs and symptoms of an illness appear.

What are types of diseases Class 9?

Diarrhoea can be examined by loose motions. Airborne Diseases Common cold, influenza, measles, tuberculosis. Water borne diseases Cholera, typhoid, hepatitis. Sexual Diseases AIDS, Syphilis.

What are the classification 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 …

What is common disease?

Allergies. Colds and Flu. Conjunctivitis (“pink eye”) Diarrhea.

What are the 2 main types of disease?

Diseases can be grouped into two types: 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 disease process?

(dɪˈziːz ) any impairment of normal physiological function affecting all or part of an organism, esp a specific pathological change caused by infection, stress, etc, producing characteristic symptoms; illness or sickness in general […]

Why do we fall ill Class 9 topper?

Major factors affecting health are Nutrition, Physical activity, Personal hygiene, clean environment, and mental stress. External factors that cause disease are pathogens, toxic pollutants, and Poor food and dietary choices.

Why do we fall ill BYJU’s?

We fall ill because we live in an area with polluted surroundings or lack of personal hygiene. It is very important to adopt certain strategies to stay healthy and prevent diseases. One should remain active by exercising daily. Eating healthy helps in the prevention of diseases.

What is health class 9?

Health is a state of complete physical mental and social well being. Its not only the absence of disease. ​ A person is said to be healthy when he/she is free of any type of disease (infectious/deficiency), when he/she is mentally happy and healthy and when his/her social relationships are healthy in a society.

Is virus and disease the same?

Viruses and diseases are not the same. A virus can cause an individual to develop a disease. A disease can result from someone contracting a virus through surface contact or droplets in the air. While viruses and diseases are related, the terms should not be used interchangeably.

Is obesity a disease?

Obesity is a complex disease that occurs when an individual’s weight is higher than what is considered healthy for his or her height. Obesity affects children as well as adults. Many factors can contribute to excess weight gain including eating patterns, physical activity levels, and sleep routines.

What is disease Wikipedia?

A medical condition is a broad term that includes all diseases and disorders. A disease is an abnormal condition affecting the body of an organism.

What is the difference between disease and illness?

Illness is something that needs to be managed such as feelings of pain, discomfort, distress, weakness, fatigue, etc. Obviously, these two things are not mutually exclusive, and they often occur together. Disease is something that needs to be cured. Illness is something that needs to be managed.

What are the six diseases?

The name “sixth disease” comes from its place on the standard list of rash-causing childhood diseases, which also includes measles (first), scarlet fever (second), rubella (third), Dukes’ disease (fourth, but is no longer widely accepted as distinct from scarlet fever), and erythema infectiosum (fifth).

What was the first disease?

Let’s start at the beginning. “First disease” (measles), first scientifically described around the 10th century, is caused by measles virus. A maculopapular rash initially presents on the face and behind the ears. Bluish white Koplik’s spots may be seen on the inner cheek.

How can we prevent diseases?

  1. Eat Healthy. Eating healthy helps prevent, delay, and manage heart disease, type 2 diabetes, and other chronic diseases.
  2. Get Regular Physical Activity.
  3. Avoid Drinking Too Much Alcohol.
  4. Get Screened.
  5. Get Enough Sleep.

How many human diseases are there?

The focus is really on rare diseases, but a credible case can be made that there are at least 10,000 diseases in the world, though there is likely more.

How is disease identified?

Doctors suspect an infection based on the person’s symptoms, physical examination results, and risk factors. First, doctors confirm that the person has an infection rather than another type of illness. For example, a person with a cough and difficulty breathing may have pneumonia (a lung infection).

What are the 20 common diseases?

  • Diabetes.
  • Depression.
  • Anxiety.
  • Hemorrhoid.
  • Yeast infection.
  • Lupus.
  • Shingles.
  • Psoriasis.

What are 5 infectious diseases?

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