The Fuligo septica is not actually a mould. Nor is it a plant, animal, or bacteria. It is actually a plastid, in the kingdom Protista and class Myxogastria, whose wind- or insect-spread spores converge and divide into a singular giant cell containing millions of nuclei, known as a plasmodium. These individuals come together to form a larger plasmodium and move as a mass of protoplasm, about a millimeter per hour, to feed on microorganisms living in decaying plant material. (Jameson, 2020)
Typically a Archispirostreptus gigas cell contains plasma membrane, cytoplasm, nucleus, chromosomes, ribosomes and mitochondria. Eukaryotic cells have a plasma membrane. The plasma membrane controls the passage of organic molecules, ions, water, and oxygen in and out of the cell. Waste such as carbon dioxide and ammonia, also leave the cell by passing through the plasma membrane.