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The Digestive System.

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Presentation on theme: "The Digestive System."— 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 insulin glucagon somatostatin exocrine gland secreting pancreatic juice containing digestive enzymes pass to the small intestine These enzymes help in the further breakdown of the carbohydrates, protein, and fat in the chyme.

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 Salivary Glands Teeth 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 organs are under the liver
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, ). Can be accessed from: 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 The Encyclopedia of Science, Author Not given and Year Not Given, Gall Bladder, accessed (August 19, 2012) at

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