DIGESTIVE SYSTEM

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• DIGESTIVE SYSTEM

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• The human digestive system is a complex
  series of organs and glands that processes food.
  In order to use the food we eat, our body has to
  break the food down into smaller molecules that
  it can process it also has to excrete waste.

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• Most of the digestive organs (like the stomach
  and intestines) are the tube-liked and contain
  the food as it makes its way through the body.

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• The digestive system is essentially a long,
  twisting tube that runs from the mouth to the
  anus, plus a few other organs (like the liver and
  pancreas) that produce or store digestive
  chemicals.

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Mouth

• The mouth is where the digestive tract begins.
  There are different enzymes which help the
  process of digestion.

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Tongue

• It is a long soft piece of flesh fixed to the
  bottom of your mouth that you use for tasting,
  speaking etc.

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Tooth

• Any of the hard white objects inside your mouth
  that use for biting and for chewing food.

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Pharynx

• Because both food and air move through it, the
  pharynx is a part of both of respiratory and
  digestive system. It is the top of your throat.

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Esophagus

• It is a soft, muscular tube that moves food from
  the pharynx to the stomach.

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Liver

• The liver is the largest internal organ,
  which performs many tasks, including storing
  energy and helping the body get rid of toxins.

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Stomach

• The stomach has a lining thats tough enough
  to hold up in the highly acidic environment
  needed to break down food.

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Gall-bladder

• The gall-bladder is a small poach that stores
  bile. The gall-bladder releases bile into the
  duodenum to help digest fats in the food you eat.

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Pancreas

• The pancreas makes hormones to regulate the
  blood glucose level. It also makes enzymes to
  break down food in the intestines.

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Transverse colon

• It is the longest and most movable part of the
  colon, passes with a downward convexity from the
  right hypochondrium region across the abdomen,
  opposite the confines of the epigastric and
  umbilical zones .

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Duodenum

• It is the first section of the small
  intestine in most higher vertebrates. The
  duodenum is a hollow jointed tube about 25-30 cm
  (10-12 in) long connecting the stomach to the
  jejunum. It begins with the duodenal bulb and
  ends at the ligament of Treitz.

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Ascending colon

• The ascending colon is smaller in caliber than
  the cecum, which contiguous with.

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Descending colon
The descending colon passes downward through the
left hypochondrium and lumbar regions, along the
lateral border of the left kidney.
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Small intestine
The stomach releases food into the duodenum,
which is the first segment of the small
intestine. The rest of the small intestine,
located below the duodenum, consists of the
jejunum and the ileum.
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Cecum
The cecum or caecum is a pouch, connecting the
ileum with the ascending colon of the large
intestine. It is separated from the ileum by the
ileocecal valve.
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Appendix
The appendix has no function in modern human
body, however, it is believed to have been part
of the digestive system in our primitive
ancestors.
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Rectum
The rectum is the final 6 to 8 inches of the
large intestine. It stores feces until they leave
the body.
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Anus
The anus marks the exit point of the
digestive tract where feces leave the body.

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Prepared by

• Galya Petkova and Ana-Mariya Velcheva
• Geo Milev Math High School, Pleven, Bulgaria