... to life. Malignant tumors are cancer. They can invade and damage nearby tissues and organs. Cancer can also break away from a malignant tumor and enter the bloodstream and lymphatic system. Through the lymphatic system is one of cancers best modes of transport for spreading to form new tumors in ... these are radiation, chemotherapy, surgery and the rapidly growing field of genetic therapy. It was discovered that when radioactive waves were directed on human cells, the cells would be destroyed. The idea of using this technology on cancer was a good one but was unsuccessful at first due...

• Word Count: 1594
• Approx Pages: 6
• Grade Level: High School

... pain. Heroin can be injected into a vein or a muscle, smoked in a water pipe, inhale as smoke through a straw or snorted as powder via the nose. Cocaine is a powerful central nervous system stimulant that heightens alertness, inhibits appetite and the need for sleep, and provides intense feelings of pleasure. Cocaine's short-term effects appear soon after a single dose. Marijuana is usually smoked ... health risks. In general, chronic exposure to nicotine may cause an acceleration of coronary artery disease, peptic ulcer disease, reproductive disturbances, fetal illness and death. Tobac...

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• Approx Pages: 8