Every cell in the human body functions at a very small range on the Ph scale; any variance from this can cause death or illness. The Ph is regulated by the kidneys and lungs. Look up Ph at www.wikipedia.com; it is too extensive to go into here.
grade
Convection currents are the vertical circular movements of fluids that transfer due to changes in density.
Convection currents are vertical circular movements of fluids that transfer energy due to changes in density.
Convection currents are vertical circular movements of fluids that transfer energy due to changes in density.
Either and acid shift or an alkaline shift in the body fluids could threaten the internal environment.
buffers
Consuming body parts and interfering with life-sustaining activities are ways in which insects can threaten farm animals and crops. For example, viruses may be transmitted through an insect's piercing animal or plant tissue and removing internal fluids.
vitamins and mineral salts
coal
coal
alkalines
protein and mineral salts