* The red triangle denotes the pyramid of diseases caused by etiological factors which produce morbidity in bio fluids and damage the defense mechanisms of tissues and channels. They are called [[Nidana]], [[Dosha]] & [[Dushya]] respectively. | * The red triangle denotes the pyramid of diseases caused by etiological factors which produce morbidity in bio fluids and damage the defense mechanisms of tissues and channels. They are called [[Nidana]], [[Dosha]] & [[Dushya]] respectively. |