Distinguish between Benign tumour and Malignant tumour.

Explanation

Tumor can be classified into two types: 1.Benign tumors: Tumors results from abnormal and persistant cell division consists of cancer cells that remains localized at the spot of origin and do not spread to distint sites. These are not great threat to life (non- fatal), but some can be fatal, as in brain tumour. Well -differentiated cells generally characterize benign tumours. 2. Maliganant tumours: Tumours result from abnormal and persistent cell division consist of cancer cells that may be carried by the circulating fluid (blood or lymph) 0r by direct penetration to other part of the body and changing the neighcbouring tumours. Malignant tumours usually contain undifferentiated cells. These are fatal to the organism. The phenomenon of formation of secondary tumours is called metastasis.