What they mean is that mitochondria get the energy out of glucose in respiration: they use this energy to make a wonderful chemical called ATP. Cells need energy for other processes such as the synthesis of proteins from amino-acids and the replication of DNA.
Small intestine. The small intestine or small bowel is the part of the gastrointestinal tract between the stomach and the large intestine, and is where most of the end absorption of food takes place. The small intestine has three distinct regions â the duodenum, jejunum, and ileum. The duodenum is the shortest part of the small intestine and is where preparation for absorption begins. It also receives bile and pancreatic juice through the pancreatic duct, controlled by the sphincter of Oddi. The primary function of the small intestine is the absorption of nutrients and minerals from food.
Small Intestine. The small intestine is a long, highly convoluted tube in the digestive system that absorbs about 90% of the nutrients from the food we eat.It is given the name âsmall intestineâ because it is only 1 inch in diameter, making it less than half the diameter of the large intestine.he small intestine is, however, about twice the length of the large intestine and usually measures about 10 feet in length. The small intestine winds throughout the abdominal cavity inferior to the stomach. Its many folds help it to pack all 10 feet of its length into such a small body cavity....