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.
Knee swelling, swollen knee pain, and swelling above the knee can be from several causes. A swollen knee no pain is common and can be from a reaction to a small incident where the capsule becomes irritable. Usually swelling in the knee is due to an injury to the ligaments or meniscus from within the knee joint and capsule such as an anterior cruciate tear or a bucket handle tear to the meniscus. Swelling behind the knee is usually associated from an injury within the joint but can also be from a bakerâs cyst or a soft tissue injury such as a tear.