How does disease affect the body?

How does disease affect the body?

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. In response to infection, your immune system springs into action.

How does disease affect the ecosystem?

An ecosystem with lots of variation (genetic diversity and diversity of species) is more resilient to the impacts of disease because there are greater possibilities that some species have evolved resistance, or if a species is lost, there will likely be another species to fill the niche of an extinct species.

How is disease caused in the organisms?

Infectious diseases commonly spread through the direct transfer of bacteria, viruses or other germs from one person to another. This can happen when an individual with the bacterium or virus touches, kisses, or coughs or sneezes on someone who isn’t infected.

What are the effects on an infected organism?

A person with a bacterial infection will often experience redness, heat, swelling, fever, and pain at the site of infection, as well as swollen lymph glands. A rash can indicate a fungal infection of the skin. However, viruses and bacteria may also cause skin conditions and rashes.

Can diseases cause extinction?

Invading infectious diseases can, in theory, lead to the extinction of host populations, particularly if reservoir species are present or if disease transmission is frequency-dependent.

What happens to an ecosystem due to human activity?

Human activity is causing environmental degradation, which is the deterioration of the environment through depletion of resources such as air, water and soil; the destruction of ecosystems; habitat destruction; the extinction of wildlife; and pollution.

How does a disease affect the body of an organism?

A disease is an abnormal condition affecting the body of an organism. It is often construed to be a medical condition associated with specific symptoms and signs. It may be caused by external factors, Pathogens such as infectious disease, or it may be caused by internal dysfunctions, such as autoimmune diseases.

How does disease affect the homeostasis of an organism?

Disease affects an organism by disrupting the organism’s homeostasis. Homeostasis is the process by which an organism maintains a steady internal environment (stable body temperature, blood sugar level, electrolyte balance, etc.). A disease will disrupt this process.

What are the causes and symptoms of infectious diseases?

Infectious diseases 1 Overview. Infectious diseases are disorders caused by organisms — such as bacteria, viruses,… 2 Symptoms. Each infectious disease has its own specific signs and symptoms. 3 Causes. These one-cell organisms are responsible for illnesses such as strep throat,… 4 Risk factors. While anyone can catch infectious diseases,…

Can a disease cause an organ to malfunction?

This malfunction may be caused by an external factor like trauma, pathogens, radiation etc. or an internal factor like a heritage of a disease causing gene. Human body is a collection of organs so there is no way that a disease can not affect an organ.