1. PHOTOSYNTHESIS AND CELLULAR RESPIRATION
We will examine the exchange of oxygen and carbon dioxide between living things and the environment.

2. Key Elements
Chloroplasts - Organelles found only in plant cells that carry out photosynthesis.
Mitochondria - Organelles found in plant and animal cells that carry out cellular respiration.

3. What is Photosynthesis?
The process by which chloroplasts capture sunlight energy and make food for a plant.
The sun is the source of energy for photosynthesis.

4. Why is Photosynthesis Important?
It is important because it is the only thing that produces oxygen
absorbs CO2

5. Structural Components:
1. Chlorophyll
only found in chloroplasts (leaves)
absorb sunlight 
2. Stomata
tiny pores (holes) under the leaves of plants
where CO2 enters and oxygen exits
3. Roots:
absorbs water

6. EQUATION FOR PHOTOSYNTHESIS
Reactants
Products
WATER
OXYGEN
produces
6CO2 +
6H2O +
ENERGY
C6H12O6 +
6O2
CARBON DIOXIDE
GLUCOSE

7. Photosynthesis Process
1: Chlorophyll in chloroplasts absorbs sunlight
2: From sunlight, green plants combine with CO2 from the air, and water from the roots to make sugar and oxygen.
3: Oxygen exits the plant through stomata into the air
4: Plants use sugar to make starch, fats, proteins (food)
5: Food is spread throughout the plants by the stem
“oxygen is released from plants everyday…while carbon dioxide is taken away”

8. What is Cellular Respiration?
A process by which both plants AND animals cells turns food molecules into usable energy (ATP)
Breathing in and out is often referred to as “respiration” and it is connected to, though not the same as, cellular respiration. Breathing provides the oxygen needed for cellular respiration to occur.

9. Plants –vs- Animals
Plants are autotrophs and produce their own glucose to be used in the respiration reaction.
Animal are heterotrophs, meaning that they cannot produce their own food and need to get their glucose from a plant OR a plant eating animal.
The energy molecule formed in both plants and animals is called ATP (adenosine triphosphate)

10. 2 stages of Cellular Respiration
Step 1: Glycolysis
In the Cytoplasm, glucose is broken down into 2 smaller molecules (Pyruvic Acid) and a small amount of energy is release (ATP).
Step 2:
In the Mitochondria, these 2 smaller molecules are combined with oxygen to produce carbon dioxide and water and a great deal of energy (ATP) is produced.

11. EQUATION FOR RESPIRATION
Reactants
Products
Used by the cells to grow and reproduce.
Released into the atmosphere by breathing.
OXYGEN
ATP
GLUCOSE
WATER
C6H12O6 +
6O2
produces
6CO2 +
6H2O +
ENERGY
CARBON DIOXIDE
Produced in plants by photosynthesis or eaten by animals as food.
Absorbed from the atmosphere by breathing .
Used by the cells or released by osmosis and excretion.

12. HOW IT RELATES!

13. Overview of photosynthesis and respiration
SUN
RADIANT ENERGY
CELL
ACTIVITIES
PHOTOSYNTHESIS
RESPIRATION
GLUCOSE
ATP(ENERGY)

14. Photosynthesis and Cellular Respiration equations are essentially opposites of each other!

15. Can You See How It Relates?
Click Here

16. Lesson Summary
Photosynthesis and cellular respiration are related. How?
Photosynthesis occurs in the chloroplast of plant cells.
Cellular respiration occurs in the mitochondria of plant and animal cells.
Whenever you see an arrow in our equations, think “produces”.
Reactants produce products. Remember, what one produces the other one needs. It is a cycle.