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The opening between the lips is termed the oral fissure, and the opening into the throat is called the fauces. [9] At either side of the soft palate are the palatoglossus muscles which also reach into regions of the tongue. These muscles raise the back of the tongue and also close both sides of the fauces to enable food to be swallowed.
Open defecation can pollute the environment and cause health problems. High levels of open defecation are linked to high child mortality, poor nutrition, poverty, and large disparities between rich and poor. [33]: 11 Ending open defecation is an indicator being used to measure progress towards the Sustainable Development Goal Number 6.
The gastrointestinal tract (GI tract, digestive tract, alimentary canal) is the tract or passageway of the digestive system that leads from the mouth to the anus.The GI tract contains all the major organs of the digestive system, in humans and other animals, including the esophagus, stomach, and intestines.
In humans, the anus (pl.: anuses or ani; from Latin ānus, "ring", "circle") [1] [2] is the external opening of the rectum located inside the intergluteal cleft.Two sphincters control the exit of feces from the body during an act of defecation, which is the primary function of the anus.
This opening, often in conjunction with an attached ostomy system, provides an alternative channel for feces to leave the body. Thus if the natural anus is unavailable for that function (for example, in cases where it has been removed as part of treatment for colorectal cancer or ulcerative colitis ), an artificial anus takes over.
The sphincter urethrae, or urethral sphincter, controlling the exit of urine from the body. At the anus, there are two anal sphincters which control the exit of feces from the body, the internal anal sphincter and external anal sphincter. The inner sphincter is involuntary and the outer is voluntary.
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The cardia is a very small region of the stomach that surrounds the esophageal opening. [8] The fundus (from Latin 'bottom') is formed in the upper curved part. The body or corpus is the main, central region of the stomach. The pylorus opens to the body of the stomach.