The Digestive System

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The Digestive System

• By Sara Silver
• Northern Michigan University

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The Digestive SystemBy Sara Silver

• The human body has a few many systems that work
  together to
• help an individual function in life.
• One of these main systems is the
• DIGESTIVE SYSTEM

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The Digestive SystemBy Sara Silver

• Where do people get fuel to have energy
• for playing and working?
• FOOD
• Food is broken down by the
• digestive system and sent to all
• the body parts for nourishment.

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The Digestive System By Sara Silver

• The Digestive System starts
• working as an individual takes a
• bite of some form of food and it
• keeps working for a few hours.
• Digestion is a process that
• allows the body to pick up needed
• nutrients for energy.

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The Digestive SystemBy Sara Silver

• The DIGESTIVE TRACT
• is the key part of the Digestive System.
• The Digestive Tract is
• a tube about 9 meters long and
• it runs through the middle of the body starting
  at the mouth and
• ending at the anus.

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The digestive systemBy Sara silver

• The Digestion process starts at the MOUTH
• An individual uses his or her teeth to
• bite and chew food.
• The person keeps chewing until the food
• is easy enough to swallow.
• Saliva and the food blend together forming
• a moist and slippery mixture.

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The digestive systemby Sara Silver

• Next the food moves through the
• OESOPHAGEUS (or gullet)
• This muscular tube transports food from the
  throat down into the stomach.
• Peristalsis are muscles that work to push the
  food down this tube.

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The digestive systemby Sara Silver

• Then the food gets broken down in the
• STOMACH
• The walls of the stomach are made up of
• muscles that smash up the food into a mixture
• that looks like soup.
• Intense digestive juices attack the food and
  break it down getting the nutrients out for the
  body to use.

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The digestive systemby Sara Silver

• Next the food goes into the
• PANCREAS
• The same strong digestive juices that are made in
  the stomach are also made here.
• These juices are enzymes that help break down
  food even more to get ready to enter into the
  small intestines.

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The digestive systemby Sara Silver

• Before the food reaches the small intestines
• another body part has a big job to do first
• GALL BLADDER
• The gall bladder is like a tiny baggy
• and it is under the liver.
• Bile made in the liver, shoots out from
• the gall bladder, travels through bile duct,
• and into the small intestines.

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The digestive systemby Sara Silver

• Next the food enters into the
• SMALL INTESTINES
• The small intestines is a long, narrow tract
• (about 20 feet long).
• In here, enzymes are still breaking down the
  food.
• At this point, the nutrients are small enough
• to get through the small intestines lining so
  they
• can get into the blood.

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The digestive systemby Sara Silver

• The next body part in the Digestive Tract is the
• LIVER
• The liver receives blood from the small
  intestines that carries nutrients, vitamins, and
  minerals.
• The liver is in charge of more than 200 jobs.
• The liver holds nutrients then changes their form
  so they can be released in the blood for whatever
  functions the body needs.

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The digestive systemby Sara Silver

• Next comes the important work of the
• LARGE INTESTINES
• The large intestines absorbs the stuff the body
  has not used yet, like extra water and minerals
  and puts it back into the blood.
• After all this, what remains is brown, semi-solid
  waste that need to be taken out of the body.

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The digestive systemby Sara Silver

• The waste that needs to be removed
• from the body goes into the
• RECTUM and ANUS
• The waste is stored up in the rectum, which
• is at the end of the large intestines.
• Then the waste is pressed through the anus, which
  is made of muscles, and it is finally out of the
  body.

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The digestive systemby Sara Silver

• Click on the link below to learn some more
  information that is vital to your health
• How to Take Care of Your Liver

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The digestive systemby Sara Silver

• Diagram of the Digestive System
• Digestive System