Well, I hate analogies so I'll leave those to someone with a little more imagination than me, but I can help you out on what each of those parts does.

Cell Membrane- this is just a membrane that encircles the cell and keep all of the other parts contained within it. A notable attribute of the cell membrane is that it is selectively permeable, meaning that it allows some molecules and ions to pass through, while preventing the passage of others. The membrane is composed of two layers of lipids, with their polar, hydrophilic ends at the center of the membrane and their non-polar, hydrophobic ends at either side of the membrane (this type of membrane prevents the passage of almost all types of molecules and ions). Passage through the membrane is allowed through proteins that are floating around in the membrane, which allow specific molecules and ions to pass through, and which sometimes even actively transport them through the membrane.

Cytoplasm- this is just the fluid medium inside of the cell that fills the space between all of the various organelles.

Chromatin- this is the DNA of the cell as it exists when the cell is in interphase (not going through mytosis; when it is going through mytosis the DNA exists as chromatids). In this state the DNA is basically all stretched out, and it's purpose is to store the information needed by the cell to synthesize new proteins.

Nucleus- this is the center of the cell where the DNA is contained. It is surrounded by a second membrane to provide extra protection for the DNA.

Nucleolus- a smaller body inside of the nucleus where the synthesis of ribosomes takes place.

Mitochondria- these are oblong shaped organelles that produce energy for the cells through respiration (a rather complex process that you'll learn about later on).

Golgi apparatus- this organelle is like a series of wafers stacked on top of eachother and it's purpose is to process various compounds then encase them in vacuoules for either transport within the cell or for removal from the cell.

Ribosomes- these are distributed all around the rough endoplasmic reticulum and are used to synthesize proteins from amino acids (something else you'll learn about later on).

Endoplasmic Reticulum- this is just a giant mass of membranes that extends from nucleus all throughout the cell, and is used as a transport system for the various things traveling through the cell. There are two types of ER, smooth and rough, and are differentiated by whether or not they possess ribosomes.

Nuclear Envelope- This is just the membrane that surrounds the DNA of the cell, thus forming the boundry of the nucleus. It provides extra protection for the DNA.

Cell Wall- this is an addition to the cell membrane that exists only in plant cells. It's composed of cellulose, providing a rigid shape and structure to the cells.

Cholorplast- another organelle found only in plant cells that contains chlorophil, and is where plants perform photosynthesis (another highly complex process that you'll learn about at the same time as respiration).

Centriole- these are rod shaped organelles that are used only during mytosis to separate the chromatids. They are usually only present in animal cells.

Cytoskeleton- this is a series of small, rigid tubules that is present in some cells to give them extra structure.

Cilia- small hair-like structures that extend from the cell membrane and are used for locamotion and to sweep up food particles. These are mostly found on protists.

Flagellum- this is similar to cilia in that it is used to provide locamotion, except that it is just a single, large extension of the cell membrane that is rather like a tail.

Lysosome- these are vacuoles filled with destructive enzymes that are used by cells to dispose of wastes, or in some cases to destroy other cells (such as in the case of white blood cells).

Vacuole- a small sac-like membrane created within the cell to contain various compounds.