The small intestine is a tubular structure within the abdominal cavity that carries the food in continuation with the stomach up to the colon from where the large intestine carries it to the rectum and out of the body via the anus.The main function of this organ is to aid in digestion.he small intestine is a tubular structure within the abdominal cavity that carries the food in continuation with the stomach up to the colon from where the large intestine carries it to the rectum and out of the body via the anus. The main function of this organ is to aid in digestion.
Report Abuse. 1  It depends on what the blood work is being drawn for. 2  Depending on the tests, he may need to fast for 12 hours before having the blood work done. 3  This depends on the lab work.  i have had a known practitioner say 10 hours and yet another known practitioner say 12 hours.
Examples of blood tests that may be done after a period of fasting include fasting blood sugar (fasting plasma glucose) test and lipid profile (cholesterol and triglycerides). http://www.webmd.com/hw/health_guide_ato... Patients who are scheduled for a lipid profile test should fast (except for water) for 12-14 hours before the blood sample is drawn. If the patient's cholesterol is to be fractionated, he or she also should avoid alcohol for 24 hours before the test. http://www.healthatoz.com/healthatoz/Ato... To get accurate results, you should fast for 9 to 12 hours before the test. The health care provider may advise you to stop taking drugs that can affect the test. (See Special considerations.) You may drink water during the fast, but other beverages such as coffee, tea, or soda may affect results.