Cancer :: essays research papers fc

I chose to do my report on fagcer because it is a subject I want tolearn about and because it can probably fit 5 pages. Mybibliography is on the ending of the report, my teacher helped mewith it because I didnt know how to do it. malignant neoplastic disease is the name fortumors that atomic number 18 malignant. Malignant tumors do not respond tobody mechanisms that limit growing. Malignant tumors show a notnormal cell structure the same functional vary cells. Alsocancer cells growing in laboratory tissue finale do not stopgrowing when they touch each former(a) on a glass or other solid come out of the closet but grow in masses several layers deep they argon said to lackcontact inhibition. Loss of contact inhibition accounts for devil othercharacteristics of cancer cells invasiveness of surrounding tissuesand metastasis spreading via the lymph system or agate line to othertissues and organs. Cells are typically controlled by proceeds factorscompetence factors that suffer ce lls to enter the beginning phaseof cell replication and progression factors that encounter completion ofthe replication cycle. The unrestricted growth rates of cells are collectibleto the activation and lack of inhibition of oncogenes. They arecancer causing genes.Cancer tissue that grows without limits competes with normaltissue for nutrients kills the normal cells by nutritional deprivation.cancerous tissue also causes secondary effects with the symptomsof a malignant growth caused by the pressure of the growing tumoragainst surrounding tissue or the metastasis of cancer cells andtheir invasion of other organs. Cancers are graded as to stagecoach ofmalignancy on a scale of one through cardinal the distinction betweeneven benign and malignant neoplasms is obscure. All organs andtissues are susceptible to cancer.A lot of human cancers may be caused or at least triggered byvarious chemical agents. Alkylating agents are thought to have acarcinogenic effect because they chemically turn the cells nucleicacids. Nitrites common additives in processed meat react withamines in the lose to form nitrosoamines which just aboutauthorities believe may be carcinogenic to humans. Othercommonly occurring carcinogens are azo dyes, polycyclichydrocarbons, and urethane. Certain carcinogens presentoccupational hazards. Asbestos particles once inhaled stay in thelung and act as an irritant. In the asbestos and braidindustries workers have a high probability of developing a opprobriouscancer of the chest lining or abdominal lining 25 to 30 years afterthe initial inhalation of . Asbestos also has been joined to lung andcolon cancers in exposed individuals. Oral cancer common in Indiais commonly attributed to the chewing of betel nuts. Although theapparently increasing incidence of some types of highly malignant