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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.
The human body produces and destroys 15 million blood cells every second.
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
![Critical thinking involves analysis in which the nurse examines patient data available from a variet](https://biology-forums.com/gallery/47/medium_2137_17_05_12_1_44_01.jpeg)
![The tone of the nurse-patient introduction sets the stage for the patient interview and patient care](https://biology-forums.com/gallery/47/medium_2137_17_05_12_1_56_10.jpeg)