Cancer :: essays research papers fc

I chose to do my report on crabby person because it is a subject I want tolearn about and because it can credibly fit 5 pages. Mybibliography is on the ending of the report, my teacher helped mewith it because I didnt fuck how to do it. Cancer is the name fortumors that are malignant. Malignant tumors do non respond tobody mechanisms that limit growing. Malignant tumors show a notnormal cell structure the same functional specialized cells. overlymalignant neoplastic disease cells growing in laboratory create from raw material culture do not stopgrowing when they touch each different on a glass or other solidsurface precisely grow in masses several layers deep they are give tongue to to lackcontact inhibition. Loss of contact inhibition accounts for two othercharacteristics of cancer cells invasiveness of surrounding wandersand metastasis spreading via the lymph system or blood to othertissues and organs. Cells are typically controlled by growth factorscompetence factors t hat stimulate cells to visualise the beginning phaseof cell replication and progression factors that insure limit ofthe replication cycle. The unrestricted growth rates of cells are dueto the activating 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 degree of malignance on a scale of one through four the notation 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 judgment to open acarcinogenic effect because they chemically alt er the cells nucleicacids. Nitrites parking lot additives in processed meat react withamines in the stomach to physique nitrosoamines which someauthorities believe may be carcinogenic to humans. different usually occurring carcinogens are azo dyes, polycyclichydrocarbons, and urethane. Certain carcinogens presentoccupational hazards. Asbestos particles at a time inhaled stay in thelung and act as an irritant. In the asbestos and constructionindustries workers have a high probability of developing a fatalcancer of the chest lining or abdominal lining 25 to 30 years afterthe initial inhalation of . Asbestos also has been linked 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