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The Digestive System. The Pancreas  The pancreas is a gland organ in the digestive and endocrine system of vertebrates.  endocrine gland  hormones.

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Presentation on theme: "The Digestive System. The Pancreas  The pancreas is a gland organ in the digestive and endocrine system of vertebrates.  endocrine gland  hormones."— Presentation transcript:

1 The Digestive System

2 The Pancreas  The pancreas is a gland organ in the digestive and endocrine system of vertebrates.  endocrine gland  hormones 1. insulin 2. glucagon 3. somatostatin  exocrine gland  secreting pancreatic juice  containing digestive enzymes  pass to the small intestinesmall intestine  These enzymes help in the further breakdown of the carbohydrates, protein, and fat in the chyme.carbohydrates

3 The Gallbladder  The gallbladder is a small pouch which is 7-10 cm long and 4 cm diameter that sits just under the liver( Dimensions Info, year not given).  stores bile produced by the liver  bile digest fats  Gallbladder isn’t essential  After meals  empty and flat.  Before a meal,  may be full of bile  about the size of a small pear.

4 The Mouth  Different Parts  Tongue  muscular organ  covered in pink tissue called mucosa  tasting, chewing and swallowing food  Salivary Glands  secrete saliva.  Teeth  Hard pieces of calcium used for chewing.  Consists  of the root (the part inside the gums)  and crown (the white part)

5 Pharynx  A fibro-muscular passageway  Also known as the throat  Functions  conducts air to and from the trachea(windpipe) during respiration  extends from the base of the skull to the bottom layer of the cricoid cartilage  allows swallowed solids and liquids into the esophagus, or gullet

6 The Esophagus  muscular tube connecting the throat (pharynx) with the stomach.  The esophagus is about 8 inches long,  lined by moist pink tissue called mucosa  transports to the stomach from the mouth  food  liquids

7 Liver  Description  big organ  weighs about 3 pounds  reddish-brown  usually you cannot feel the liver, as it is protected by the rib cage.  the right side of the belly  organs are under the liver  the gallbladder  parts of the pancreas and intestines.  The liver has two large sections called the right and left lobes.  Main functions  filter blood coming from the digestive tract  detoxifying chemicals  metabolizing drugs  making proteins that are important for blood clotting and other functions

8 Stomach  muscular organ  located on the left side of the upper abdomen  receives food from the esophagus  As food reaches the end of the esophagus, it enters the stomach through a muscular valve called the lower esophageal sphincter.  secretes  acid that digest food  enzymes that digest food  Rugae (muscle tissue) line the stomach  contract periodically, churning food to enhance digestion.  The pyloric sphincter  muscular valve that opens to allow food to pass from the stomach to the small intestine.  Followed by the stomach is the small intestine

9 Small Intestine  Description  Lengthy  Narrow  spiraled tube  connected to the large intestine and the stomach.  Functions  main digestion processes  absorption of food that is held in the central and lower abdominal cavity  Cool Fact- it has the surface area of a tennis court!

10 Colon (Large Intestine)  Functions  Removing  Water  Salt  Some nutrients  All developing stool.  Muscles line the colon’s walls  constrict the products along  Billions of bacteria coat the colon and its contents, living in a fit balance with the body

11 Anus  is the opening where the gastrointestinal tract ends and exits the body  starts at the bottom of the rectum(last portion of the colon)  Circular muscles  external sphincter ani  form the wall of the anus to keep it closed.  Glands release fluid into the anus to keep its surface moist.

12 Sources  WebMD, LLC,2009, Digestive Disorders Health Center, Pancreas, The Gallbladder, The Stomach, The Liver, The Colon, Large Intestine,2009, accessed (August, 19 2012). Can be accessed from:http://www.webmd.com/digestive-disorders/picture-of-the-_______  Insert blank with either pancreas, gallbladder, stomach, liver, colon.  Encyclopedia Britannica, Author not given, abdominal cavity, small intestine, year not given, accessed on (August 19, 2012) at http://www.britannica.com/EBchecked/topic/549336/small-intestine, http://www.britannica.com/EBchecked/topic/852/abdominal-cavity http://www.britannica.com/EBchecked/topic/852/abdominal-cavity  The Encyclopedia of Science, Author Not given and Year Not Given, Gall Bladder, accessed (August 19, 2012) at http://www.daviddarling.info/encyclopedia/G/gall_bladder.html


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