2. Some descriptions of cancer go back to ancient Egypt as far back as 1600 BC and the understanding of cancer was significantly advanced during the Renaissance period. Sir Rudolf Virchow, a German biologist is generally credited with discovering the first cancer cells.

3. Cancer cells are cells that grow and divide at an unregulated, quickened pace. Cancer cells can be quite common in a person they are only malignant when the other cells fail to recognize and/or destroy them. The failure to recognize cancer cells is caused by the lack of particular co-stimulated molecules that aid in the way antigens react with lymphocytes.

4. Cancer is a class of diseases in which a group of cells display uncontrolled growth, invasion that intrudes upon and destroys adjacent tissues, and sometimes metastasis, or spreading to other locations in the body via lymph or blood.

5. Plasma cell membrane Nucleous Nucleolus Ribosome Chromosomes Golgi Aparatus Endoplasmic Reticulum Mitochondria Cell Wall

6. The function of the nucleus is to maintain the integrity of these genes and to control the activities of the cell by regulating gene expression the nucleus is, therefore, the control center of the cell.

7. The nucleus regulates all cell activity. It does this by controlling the enzymes present. The chromatin is composed of DNA.

8. Ribosomes are organelles that consist of RNA an proteins. They are responsible for assembling the proteins of the cell. Depending on the protein production level of a particular cell, ribosomes may number in the millions.

9. Chromosomes-These are microscopic,threadlike body composed of chromatin and that appears in the nucleus of a cell at the time of cell division.Chromosomes contains the genes & normally are constant in number within the species.It's basic function is to carry hereditary materials across generations.

10. The Golgi Apparatus is an organelle found in most eukaryotic cells It processes and packages macromolecules, such as proteins and lipids, after their synthesis and before they make their way to their destination. The Golgi apparatus forms a part of the cellular endomembrane system.

11. The endoplasmic reticulum (ER) is a eukaryotic organelle that forms an interconnected network of tubules, vesicles, and cisternae within cells. Roughendoplasmic reticulum synthesize proteins, while smooth endoplasmic reticulum synthesize lipids and steroids, metabolize carbohydrates and steroids (but not lipids), and regulate calcium concentration, drug metabolism, and attachment of receptors on cell membrane proteins. Sarcoplasmic reticulasolely regulate calcium levels

12. The mitochondria provides energy for the cell. They are known as the powerhouse of the cell because they provide the location for the production of ATP (adenosine tri-phosphate).