Thus if you take a normal heart at rest that's innervated by both sympathetic and parasympathetic systems, and then sever the vagus nerve, you lose the parasympathetic input to the heart, while leaving the sympathetic input intact. The result is that the resting heart rate increases, to something closer to 100 bpm.
There are several organs and other components involved in the digestion of food. The organs known as the accessory digestive glands are the liver, gall bladder and pancreas. Other components include the mouth, teeth and epiglottis. The largest structure of the digestive system is the gastrointestinal tract (GI tract). This starts at the mouth and ends at the anus, covering a distance of about nine (9) metres. The largest part of the GI tract is the colon or large intestine.
Organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestineâwhich includes the appendix, cecum, colon, and rectumâand anus. The intestines are sometimes called the bowel. The last part of the GI tractâcalled the lower GI tractâconsists of the large intestine and anus. Anatomic problems of the lower GI tract may involve parts of organs being in the wrong place, shaped abnormally, or incorrectly connected to other organs. Anatomic problems that affect the large intestine or anus include. malrotation. volvulus. intussusception. fistula. imperforate anus. colonic atresia.