stress and health

but how can what we think make us sick or healthy? doesn't a person get sick because he comes in contact with a germ when he is injure or fatigued ,or his resistance is low?
yes in part .but what makes a person's resistance to be low?what weakens his body to such an extent that germs can mount an attack? research scientists stress (defined as wear and tear on the body by any activity)can be produced by emotions
how does this happen?experiments have shown that every emotion automatically produces certain physical changes in our body.one dramatic example of this was a man who had a surgical opening made in his stomach following an accident.this made it possible for doctors to observe the changes that occurred under different circumstances .when he was upset, his stomach became red and engorged and soon the folds were thick and turgid.acid production accelerated sharply and vigorous contractions began.
how do such dramatic changes come about ? here is how scientists explain it:whenever you in a situation of threat ,your body prepares to flee or fight . in moments of peril everything gets into the act.first, messages from your eyes or ears get carried to the pituitary gland located at the base of the brain it secretes a substance known as ACTH into the bloodstream ACTH triggers the adrenal glands,located above the kidneys , which further secretes ....cortisone.then everything within pops the heart beats rapidly .muscles of the stomach and intestines contract , forcing the blood to to circulate faster breathing speeds up.you are ready for the enemy.
after being battered by negative emotions the body breaks down at it's weakest point and illness results.