Improperly digested nutrients may indicate a problem of which tissue layer

Improperly digested nutrients can indicate a problem in the inner most layer of the stomach known as the mucosa. This is the innermost layer of the stomach and it is responsible for housing the specialized exocrine cells that secrete gastric juice. Gastric juice is a mixture of hydrochlocic acid, mucus and digestive enzymes. 

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.