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

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

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

The Cell Cycle

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

Comparing Normal & Cancer Cells Cancerous Cell Division.mht

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

Liver Tumour

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.

Cancer Cells Spreading Through the Body

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

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.

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

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

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.

Skin Cancer

The Interaction between your skin and the Sun UV Skin Animation

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

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