An accurate test for how long does nicotine stay in your system can be performed via blood test. If a laboratory is testing for nicotine, it should be performed within 3 days of smoking. It is better for a laboratory to test for cotinine as it remains in the blood stream for about 10 days after smoking.
The pH in the human digestive tract varies greatly (see Human Digestive Tract pH Range Chart on the left side). The pH of saliva is usually between 6.5 - 7.5. After we chew and swallow food it then enters the fundic or upper portion of the stomach which has a pH between 4.0 - 6.5.he pH of any solution is the measure of its hydrogen-ion concentration. The higher the pH reading, the more alkaline and oxygen rich the fluid is. The lower the pH reading, the more acidic and oxygen deprived the fluid is. The pH range is from 0 to 14, with 7.0 being neutral.
98.6 degrees Fahrenheit, or 37 degrees Celsius is approximately normal temperature for the human body.   The human body operates best at 98.6 degrees Fahreinheit (about 37o C).The healthy body temperature for humans is between 95 and between 99.3.he average human body temperature is 98.6Âº F or 37Âº C, but it can vary somewhat. Average adult temperature is 98.2Âº F (36.8Âº C). Older people average a bit less. These values can also vary with time of day.