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.
The first section of the small intestine. Ileum The last section of the small intestine which connects to the large intestine. Jejunum The middle section of the small intestine. Lipase An enzyme that breaks down fats in the digestive system. Microvilli Hair-like projections that cover villi and aid in absorption of nutrients. Peristalsis Wave-like muscle contractions that push contents through the small intestine. Small Intestine