Cells are very small parts that form every living thing. Cells join to form tissues, organs and systems. The parts of the cell are: nucleus, cytoplasm and cell membrane.
We cannot see cells, we can only see them with a microscope. Cells have different shapes that help them to develop different functions. Red corpuscles have a disc form, intestinal cells have a prism form, muscular cells have an elongated form, neurones have a branched form and ovules or egg cells have a round form. Diego Enrich Poier, 5° de Primaria..