In order to avoid contamination with indigenous bacteria prior to collecting a blood sample, O patient identity is confirmed.
Oskin must be cleaned.
O collection tube should be labeled.
O proper collection tube should be selected.
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Skin should be clean.
The other options are important for blood collection but won’t introduce foreign bacteria. Skin however can be covered in dirt/germs

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.