Chloroplasts are located within the cells of green tissues in plants and algae, most notably concentrated in the parenchyma cells of the leaf mesophyll, which is the internal cell layer of a leaf
. They are found in the cytoplasm of these cells and are responsible for photosynthesis. Chloroplasts are disc-shaped organelles enclosed by a double membrane and contain internal membrane structures called thylakoids, which are arranged in stacks known as grana
. They contain chlorophyll pigments that capture sunlight to convert it into chemical energy. In summary, chloroplasts are located inside the cytoplasm of plant and algal cells, especially abundant in the green tissues of leaves
