Keeping a list of key terms for each lesson will provide you with a good review tool for exams. Several key terms from this lesson have been provided for you here, and you should identify other key terms from the lesson that are important. For each term, note the definition as well as the term's significance.

• centriole
• centrosome
• chromatin
• cytoplasm
• cytoskeleton
• cytosol
• endoplasmic reticulum (ER)
• flagellum
• Golgi apparatus
• inner mitochondrial membrane
• lysosome
• microfilament
• microtubule
• mitochondrial matrix
• mitochondrion
• nuclear envelope
• nucleolus
• nucleus
• outer mitochondrial membrane
• ribosome
• rough endoplasmic reticulum (rough ER)
• smooth endoplasmic reticulum (smooth ER)