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P C R

Two Stages of Cellular Respiration

Cellular respiration occurs in two
stages. Stage one occurs in the Stage 1
cell’s cytoplasm and stage two
occurs in the mitochondria. glucose

Stage One of Cellular cytoplasm

Respiration
energy
During stage one, glucose
is broken down into smaller
molecules and a small amount
of energy is released.

mitochondrion

Stage Two of Cellular Respiration

In stage two the smaller molecules combine with oxygen to produce water,
carbon dioxide, and a large amount of energy.

Stage 2

oxygen

water

energy

smaller carbon
molecules dioxide
from glucose

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