structures within the chloroplast

1. Structure of chloroplasts
The outer layer is called as chloroplast
envelope ( double membrane )
The fluid in chloroplast is called as stroma

2. The network of flattened sacs in the
stroma is called as thylakoids.
Grana are formed when many
thylakoids are stacked together like a
pile of coins
Chlorophyll is found in each granum.

3. Starch grains (temporary store of
products of photosynthesis) are also
found in stroma

4. What are the advantages of
grana?
Large surface area for light absorption
Economy of space