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.
It is divided into two major sections: small intestine and large intestine. The small intestine is about 6 meters (20 feet) long. It is coiled in the center of the abdominal cavity (see picture).The small intestine is divided into 3 sections: upper, jejunum, and ileum.The lining of the small intestine secretes a hormone called secretin, which stimulates the pancreas to produce digestive enzymes. The large intestine has a larger width but is only 1.5 meters (5 feet) long.The large intestine is divided into 6 parts: cecum, ascending colon, transverse colon, descending colon, sigmoid colon, and rectum. Major function of Intestines. The small and large intestines perform different functions.t is divided into two major sections: small intestine and large intestine. The small intestine is about 6 meters (20 feet) long. It is coiled in the center of the abdominal cavity (see picture).