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Cellular Respiration
Respiration Equation
How does the food get to the cells?
How
does
this
food….
Get
here?
Cells
How does the oxygen (O2) get to the
cells?
How does
the oxygen
O2 get from
here …
to
here?
Cells
What happens to the energy? How do
we use the energy?
Cells
Cells
Cells
How does the carbon dioxide (CO2) get
out of our body?
Out
here?
How does
the CO2 get
from
here…..
Cells
How does the water vapor (waste) get
out of our body?
How does
the water
vapor
(waste)
get from
here…..
Out
here?
Cells
Remember the equation for cellular
respiration!
• It requires all 3 body systems for this to occur!
Glucose + Oxygen
ENERGY + Carbon Dioxide
+ Water Vapor
• Occurs in all cells
• Recall how each system contributes to each part
of the equation.
How does the sugar get to the cells?
• Carbohydrates get broken down in the mouth
to sugars by saliva (glucose comes from this).
• Nutrients are absorbed in the small intestines
through the villi and they go to the blood
stream through capillaries.
What transports the sugar to the cells?
• The sugar (glucose) is transported to the cells
in the plasma of the blood through arteries
that branch into capillaries where the sugar
enters the cell.
How does the oxygen get to the cells?
• O2 enters the mouth or nose goes to the lungs,
where it enters the alveoli, this is where O2
enters the blood stream(coming from the
right ventricle) on its way back to the left
atrium.
• The alveoli are
surrounded by
capillaries where the
O2 attaches to a red
blood cell .
Getting Oxygen to the cells, continued…
• When the oxygenated blood returns to the
left atrium and then left ventricle, it is
pumped through arteries that eventually lead
to capillaries at the cells. This is where the O2
enters the cell and the CO2 attaches to the red
blood cell on its way to a vein and back to the
heart at the right atrium.
Now how does the carbon dioxide and
water vapor get out of the body?
• As the capillaries branch back into veins the CO2
on the red blood cell and the water vapor return
to the right atrium, then right ventricle which
pumps the deoxygenated blood to the lungs. In
the alveoli the CO2 and water vapor leave the
capillary and enter the alveoli, they are exhaled.
What happens to the ENERGY?
• Energy is used by cells to carry out life
functions. For example, as your muscles
contract you use energy.