Q: - Air is taken through the mouth - Enters the lungs - The oxygen fills the sacs in your lungs - Carbon dioxide is removed from the lungs and exhaled What might be the last step of the process?
A: The oxygen is pass throughout your body.

Q: - There is a fetus in the womb - They are born and are a baby - The baby grows into a child - Puberty turns the child into an adolescent - The adolescent becomes an adult - An adult becomes an elderly person What might be the last step of the process?
A: The elderly person dies.

Q: - A man and woman mate - Embryo is C - Embryo grows and develops into a fetus inside the woman's womb - The fetus is born - Begins to grow and develop through infancy and childhood - In the teenage years the human experiences puberty - Reaches sexual maturity - At 18 the human becomes an adult What might be the last step of the process?
A: Adult may procreate continuing the cycle.

Q: - Fuel mixes with air - Mix gets inducted into cylinder - Piston compresses the mix - Spark plug emits a spark that ignites it causing combustion - Combustion gases expand - Pushes piston during power stroke What might be the last step of the process?
A:
Exhaust valve opens to vent exhaust out tail pipe.