Cancer - information and treatment

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

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

YouTube - How cancer develops

Cancerous Cell Division.mht

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

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 an invade other parts of the body and cause new tumours to form there

There are 2 main causes for cancer:

1 – inherited-one that appears within members of the same

familyEX. Breast and colon cancer

2- environmental- Caused by an environmental factor called a

carcinogenEX. Tobacco, X-rays, even cosmetics

Contains 4000 chemicals and 50 of them are carcinogens

the most common cause of lung cancer

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

Skin cancer is caused by ultraviolet radiation (UV) from the sun

UV causes mutations in the skin cells

There are 2 types of UV: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

UV Skin Animation

Cosmetics!! lead in your lipstick? carcinogens in your cleanser? Story of Cosmetics « The Story of Stuff

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