Disease  - A disease is a process that decreases the order and energy of a living system to the point of strain.  A disease is an abnormal physiological process that causes injury or death.  A disease must be based on the entire organism and not just its parts.  Pathogens are disseminated.  Diseases are transmitted.  A disease is a process that causes anatomical disruptions, physiological dysfunctions, and energy disruptions, that lead to strain or death of an organism, or its parts.  More on the subject:  A hereditary disease may cause anatomical or morphological abnormalities, or dysfunctions of systems, and no specific pathogen would be involved.  An abiotic agent such as a pollutant may cause a disease.  A disease is an intrinsically controlled process that threatens the survival of an organism.  A disease may also be the interaction between intrinsic and extrinsic agents that threaten the survival of the host.  When living pathogens infect an organism-the host-the pathogen begins a process of energy transfer that benefits the pathogen and harms the host.  Animals can restore strained parts that result from disease.  Trees wall off the strained parts.  As pathogens continue their activities, energy is depleted and starvation may begin.  As an organism approaches death, more and more factors enter the disease processes.  In many cases, the pathogens that started the process are not the ones that cause the death of the host.  When a host can no longer mount a defense system, it is just a matter of time before death.

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