They represent the outgrowth of the cytoplasmic membrane inside the cell, and their function is in breathing or photosynthesis, when it comes to photosynthetic bacteria.
Zimelele yayifanekisela nomxhantela we ulwelwesi cytoplasmic esitokisini, futhi umsebenzi wabo iwukuba emishinini yokuphefumula noma inqubo ye-photosynthesis, esimweni amagciwane photosynthesis.