Terminal part of the small intestine between the jejunum and cecum.
jejunumMiddle section of the small intestine between the duodenum and the ileum; the majority of nutrients are absorbed here.
duodenumAnterior section of the small intestine; secretions from the liver and pancreas, as well as food partially digested in the stomach, empty into it.
pancreasDigestive gland connected to the duodenum; produces secretions and hormones (especially insulin).
stomachDilated section of the digestive tract; it stores, stirs and mixes food with the gastric juices it secretes before emptying it into the duodenum.
schema of circulation
esophagusMuscular membranous channel of the anterior section of the digestive tract; it allows food to reach the stomach.
respiratory system
pharynxMuscular membranous channel connecting the nasal cavity to the larynx and the oral cavity to the esophagus; it enables breathing, ingestion of food and speech.
respiratory system
rectumTerminal section of the large intestine preceding the anus.
sphincter muscle of anusMuscle ensuring the contraction and relaxation of the anus and enabling defecation.
anusTerminal orifice of the digestive tube controlled by a sphincter enabling ejection of fecal matter.
sigmoid colonFourth segment of the colon; it carries waste to the rectum.
vermiform appendixTubular extension of the cecum; this appendage is occasionally the site of appendicitis, a severe inflammation.
cecumAnterior part of the large intestine; it receives food particles from the ileum.
ascending colonFirst segment of the colon; it absorbs water from food residue before it is excreted.
descending colonThird segment of the colon; it stores waste before it is eliminated.
transverse colonSecond segment of the colon (middle section of the large intestine). The right colon (the ascending colon plus half the transverse colon) mainly enables absorption of water.
gallbladderSmall reservoir where bile secreted by the liver gathers before emptying into the duodenum during digestion. Bile helps in the digestion of fatty substances.
liverViscera secreting substances, including bile, that help digestion and break up certain toxins contained in the blood.
schema of circulation
salivary glandsEach of the three pairs of organs secreting a liquid (saliva) that contains a digestive enzyme; it is used to moisten food to facilitate its ingestion.
tongueFlexible muscular structure of the oral cavity; it helps in tasting, masticating and ingesting food, and also facilitates speech.
mouth
dorsum of tongue
oral cavityAnterior cavity of the digestive tract enabling ingestion of food; it also aids in breathing.
respiratory system
small intestineNarrow section of the digestive tract, about 20 ft long, between the stomach and cecum, where a part of digestion and food absorption occurs.
large intestineLast wide section of the digestive tract, about 5 ft long, where the final stage of digestion and elimination of waste occurs; it includes the colon and the rectum
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the ileocecal valve or ileocecal sphincter
The sphincter muscle, or ileocecal valve is located at the junction of the small and large intestine.
The sphincter muscle, or ileocecal valve is located at the junction of the small and large intestine.
The opening between the stomach and the small intestine is called the Pyloric Sphincter- it is a ring of muscle that contracts when the stomach is full, to seal off the opening to the small intestine whilst foodstuffs are liquified in the stomach. When this has been done, the sphincter muscle relaxes, re-opening the channel to allow the liquified nutrients into the intestines.
The iliocecal valve is an involuntary smooth muscle sphincter located between the ileum (small intestine) and the secum (portion of large intestine). Its function is to prevent backflow or reflux into the ileum.
The ring of muscle at the entrance to the stomach is the lower esophageal sphincter. This muscle is normally contracted to close the esophagus. At the lower end of the stomach food passes through the pyloric sphincter and into the duodenum of the small intestine.
Pyloric sphincter is located at the base of the stomach and is the contracting ring of muscle which guards the entrance of the to small intestine.
ileocecal sphincter (valve)
The ring like muscle that controls the flow from the stomach to the small intestine is called the pylorus or the pyloric sphincter. It is divided into two parts: the pyloric antrum which is connected to the body of the stomach and the pyloric canal which is connected to the beginning of the small intestine (the duodenum).
The sphincter muscle, or ileocecal valve is located at the junction of the small and large intestine
Ileocecal valve
lower esophageal sphincter or gastroesophageal sphincter
The pyloric sphincter