<span>gravity and would burn up
</span>
<span>Cancerous tumors are divided into broad groups on the basis of the particular type of tissue from which the tumor cells arise. this is called histogenesis.
</span><span>Tumors are of different types, some are cancerous and some are benign (non-cancerous). In a disease of cancer, there is an abnormal cell growth. It is characterized as out of control cell growth.</span>
