(2) Besides genetic and congenital factors, the factors affecting cardiovascular diseases also include people's lifestyles. Long-term alcoholism and excessive drinking can deposit fatty substances on the blood vessel wall, narrow the lumen, increase blood pressure, and accelerate the process of arteriosclerosis, thus increasing the incidence of coronary heart disease. Nicotine in tobacco will increase the number of red blood cells in blood vessels, thicken blood, increase the burden on the heart and easily lead to heart disease. It is easy to cause fat deposition on the heart and blood vessel wall, affect its normal function, and even cause arteriosclerosis and hypertension. In addition, long-term mental stress and lack of physical exercise are also factors that induce cardiovascular diseases. The causes of cancer are: smoking, alcoholism and other bad eating habits, long-term consumption of fermented, moldy, pickled vegetables, pickles and substances containing nitrite, long-term consumption of smoked, roasted and repeatedly used fried food; Bad living habits are easy to cause cancer, mainly including smoking, drinking, sunbathing, unclean sex life and lack of exercise. Environment, water and soil pollution are all harmful to human body.
(3) Physical exercise can improve blood circulation and promote cardiovascular health; Good living habits can enhance cardiovascular function and prevent cardiovascular diseases; A positive and optimistic attitude will also greatly reduce the incidence of cardiovascular diseases. Therefore, in order to have a healthy body, we should strengthen physical exercise; Develop good living habits; Maintain a positive and optimistic mental state.
So the answer is: (1) respiratory system; Malignant tumor; Cerebrovascular diseases; heart disease
(2) Smoking a lot, eating foods with high fat content, drinking too much, and lack of exercise.
(3) Change bad living habits, take part in sports and refuse alcohol and tobacco.