CELLULAR INJURIES

---------HYPOXIA ----------
1) the most common type of injury.
2) occurs due to lack of O2
3) MAJOR REASONS: ischemia, cardiac failure, pulmonary failure, low O2 in the blood
4) ischemia - the most common reason of hypoxia.
    it occurs due to DECREASED arterial/venous outflow


------------INFECTION ---------------
1) viruses, bacteria, parasites, fungi
2) can -----directly injure the body
           ------produce toxins
         



------------CHEMICALS --------------
- drugs
- pollution
- poisons
- occupational exposure
- social lifestyle (smoking, alcohol, intravenous drugs)


----------IMMUNOLOGIC REACTIONS -------------
- allergies
- autoimmune reactions


------------physical injury --------------
- trauma
- pressure changes
- radiation
 - burn
- frostbite

---------------- CONGENITIAL DISORDERS -----------------

- inherited genetic mutations

-----------------------NUTRITIONAL / VITAMIN IMBALANCE ---------------------------
- excessive calorie intake
- inadequate calorie intake
- vitamin deficiency