Match the components of blood to their functions.
1. providing viscosity to the blood
2. clotting blood
3. transporting oxygen
4. fighting bacteria

platelets, white blood cells, red blood cells, plasma

1. Plasma
2. Platelets
3. Red Blood Cells
4. White blood cells

Where is the picture at

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.