Plasma Membrane: The plasma membrane is the outer boundary of the cell that controls what enters and exits the cell. It acts like a security guard regulating who gets in or out.
Mitochondria: Mitochondria are known as the "powerhouses" of the cell because they produce energy through cellular respiration. They can be compared to power plants generating electricity for a city.
Endoplasmic Reticulum: The endoplasmic reticulum is an extensive network of membranes involved in protein synthesis and lipid metabolism. It's like a transportation system within the city that delivers goods to their designated locations.