Difference between. Internal and external environment
Answers
Definition
Internal environment
It is the extracellular fluid (literally, fluid outside the cells) environment surrounding each cell.
External environment
It is the air surrounding the living organism.
Stability
Internal environment
There is more stability in case of the internal environment. The reason for this is because living beings cannot endure extreme changes to aspects like water accessibility and temperature. If these aspects change too extremely, the biochemical reactions that take place within living cells that are requisite for maintaining life will be interrupted. This will cause death of the living organism
External environment
The external environment of a living organism is unstable.
Examples
Internal environment
The concentration of Carbon dioxide (CO2), oxygen (O2) and water (H2O) around cells/organs/ tissues inside the body of a living organism.
External environment
Bacteria, changes in light, sound, temperature, heat, and chemical and mechanical contact.
Tolerance
Internal environment
The internal environment is constant and maintenance of a constant interior environment is called homeostasis.
External environment
The external environment is too extreme for continued survival.