Stephen Hawking: 'There is no heaven; it's a fairy story'. In an exclusive interview with the Guardian, the cosmologist shares his thoughts on death, M-theory, human purpose and our chance existence. , science correspondent. Sunday 15 May 2011 17.00 EDT First published on Sunday 15 May 2011 17.00 EDT.
Both the growth of a tumor and the repair of a scrape on the knee are similar because they involve a mass amount of blood cells in a particular area. A growth of a tumor is a huge mass of cells that form together an cause it. And like the forming tumor, when you get a scrape on your knee blood cells are clumped together forming a large mass of blood also. They are different because there isn't an opening to a tumor allowing blood cells to flow out. When there is a scrape on your knee, there is an opening/cut, allowing blood cells to flow out properly.
1 Foot swelling and Knee pain and Abdominal symptoms (2 causes) 2  Foot swelling and Knee pain and Arm symptoms (2 causes) 3  Foot swelling and Knee pain and Arthritis-like symptoms (2 causes) 4  Foot swelling and Knee pain and Body symptoms (2 causes)  Foot swelling and Knee pain and Bone symptoms (2 causes)