Overview

To efficiently perform the different functions, cells have evolved to contain many organelles, each designed to carry out a specific function. For example, the nucleus contains the cell’s genetic information and the cytoskeleton provides the structural support for the cell. In this section, we will take you on a tour through the inside of the cell and show you the functions of each organelle. The information here is organized into four sections, based on the organelle’s location inside of the cell. To get started, choose a destination below.

	Cell Membranes The cell membrane defined the first cell. Since then, it has evolved to become the repository of surface receptors and surface antigens.
	Cell Wall Plant cells have a rigid layer of cell wall instead of the more flexible cell membrane. This rigid wall provides plant cells with a firm structure.
	Cytoplasm Most of the cellular organelles are located inside the cytoplasm. Here thousands of signals are sent back and forth by the organelles. Click here to learn about the mitochondria, chloroplast, endoplasmic reticulum, golgi apparatus, lysosomes, cytoskeleton, and the vacuoles.
	Nucleus The nucleus is the center of all activities inside the cell. This is where all of the genetic information is located.

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