1.6: Chloroplasts
Chloroplasts are large organelles and their function is the formation and storage of carbohydrates from photosynthesis. The chloroplast is bounded by a double membrane.
The matrix of the chloroplast is known as the stroma . Also inside the chloroplast are separate internal membranes that form lamellae or rounded tongue-like thylakoids within the enclosing double membrane. These tongue-like or disk-like thylakoid membranes may be stacked in layers and these are referred to as grana . Grana are joined to each other by other membranes.
There are a range of other organelles which are similar to chloroplasts that are used for storage and pigmentation.