Protists may have different combinations of traits that are generally unique to either plants or animals. For example, some protists may have both flagella and chloroplasts. We have already established that eukaryotic cells have many intracellular organelles , small organs with specific roles in the life of the cell. In eukaryotic cells, these organelles are all interconnected by a membrane system, the endomembrane system. Cell Membrane -the membrane of a cell is composed primarily of a phospholipid bilayer .
Phospholipid membranes comprise the cell surface as well as surround the internal organelles.
Ribosomes are the site of protein synthesis. Golgi apparatus -stacked membranous discs that are not interconnected. Lysosomes membrane bound compartments which store hydrolytic enzymes. They help the cell break down food particles, digest infecting microorganisms, and recycle damaged cell parts. Complete structure of the chloroplast is covered in Chapter 7.