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Tumours
Beginning of essay
A tumour is a mass of new tissue growth that does not react to
normal controls or the organizing influence of other tissues, and it has no
useful function in the body. This applies to both types of ,
malignant and benign. Malignant, also known as, cancerous , are
additionally defined by their inv ....
Middle of essay
.... types have been identified in humans. In general, those derived
from epithelial tissue are carcinomas, and those from connective tissue are
sarcomas.
The most common form of malignant tumour of the respiratory tract
is lung cancer, which began increasing in frequency at an alarming rate
about 1940. In 1980 it was the leading cause of cancer deaths in men and
is also rapidly increasing in woman. It is attributed to cigarette smoking
and environmental pollution: cancer of the lung i.... |
| Number of words: 659 |
Approximate pages: 3 |
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