The article discusses the specialized structures needed by the multicellular organisms for everyday life. It highlights two different tasks of cells differentiation such as breathing and photosynthesizing. It also stresses the single-celled aquatic filter-feeder in the distinct body parts called Stentor coeruleus such as cilia which use to ingest bacteria.
Hoff, M. (2014). Heads, Tails, and Tools: Morphogenesis of a Giant Single-Celled Organism. PLoS Biology, 12(5). https://doi.org/10.1371/journal.pbio.1001862