The sciatic nerve is a large nerve that starts in the lower back. 1  It forms near the spine and is made up from branches of the roots of the lumbar spinal nerves. 2  It travels through the pelvis and then deep into each buttock. 3  It then travels down each leg. It is the longest and widest single nerve in the body.
A triglyceride is an ester derived from glycerol and three to four fatty acids. Triglycerides are the main constituents of body fat in humans and other animals, as well as vegetable fat. They are also present in the blood to enable the bidirectional transference of adipose fat and blood glucose from the liver, and are a major component of human skin oils. There are many different types of triglyceride, with the main division between saturated and unsaturated types. Saturated fats are saturated
Definition. The triglyceride level is a laboratory test to measure the amount of triglycerides in your blood. Triglycerides are a type of fat. Your body makes some triglycerides. Triglycerides also come from the food you eat. Leftover calories are turned into triglycerides and stored in fat cells for later use.If you eat more calories than your body needs, your triglyceride level may be high. See also: 1  High blood cholesterol and triglycerides.our body makes some triglycerides. Triglycerides also come from the food you eat. Leftover calories are turned into triglycerides and stored in fat cells for later use. If you eat more calories than your body needs, your triglyceride level may be high. See also: 1  High blood cholesterol and triglycerides.