1. Cancer – The Cell Cycle Gone Wrong
1.4
Cancer – The Cell Cycle Gone Wrong

2. An Overview Video YouTube - How cancer develops
Cancer - information and treatment
YouTube - How cancer develops

3. The Cell Cycle There are 3 stages in the cell cycle: 1) INTERPHASE –
cells grow and prepare to divide
2) MITOSIS – cells start to divide
3) CYTOKINESIS–
two cells are formed from one

4. The Cell Cycle

5. What is Cancer?
Cancer -is a group of diseases in the which cell division is uncontrolled
Cancer cells develop when a mutation takes place in the DNA that controls cell division

6. Comparing Normal & Cancer Cells
Cancerous Cell Division.mht

7. Tumours
A tumour is a mass of cells that continue to divide and increase in number for no benefit to the body

8. Liver Tumour

9. Types of Tumours There are 2 types of tumours: 1) Benign:
– not cancerous because it does not affect any surrounding cells
2) Malignant:
– cancerous because it interferes with the function of healthy cells
- Cancerous cells travel in the blood and can invade other parts of the body and cause new tumours to form in more than one place.

10. Cancer Cells Spreading Through the Body

11. Causes of Cancer There are 2 main causes for cancer: 1) Inherited
-one that appears within members of the same family
EX. Breast and colon cancer
2) Environmental
By a carcinogen which is an environmental factor that causes cancer
EX. Tobacco, X-rays, UV radiation from the sunlight, even cosmetics

12. Tobacco Contains 4000 chemicals and 50 of them are carcinogens
These chemicals damage DNA and can cause tumors.
Smoking is the most common cause of lung cancer in Canada.
Second-hand smoke is another major cause of cancer.

13. Foods that Protect
Antioxidants are chemicals that prevent cells from becoming cancer cells
Foods rich in antioxidants are:
Tomatoes, carrots, grapes, and broccoli
Poor diet is linked to colon cancer

14. Harmful Sunlight
Skin cancer is caused by ultraviolet radiation (UV) from the sun
UV causes mutations in the skin cells

15. Types of UV There are 2 types of UV radiation:
1) UVA – causes the skin to tan
2) UVB – causes the skin to burn
UVA penetrates more deeply and is more harmful than UVB
Both can lead to a deadly form of skin cancer called melanoma.

16. Skin Cancer

17. The Interaction between your skin and the Sun
UV Skin Animation

18. Cosmetics!! Lead (Pb) in your lipstick? Carcinogens in your cleanser?
Story of Cosmetics « The Story of Stuff Project
Lousy Labels - Marketplace

19.  Homework