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Digestive System

THE DIGESTIVE SYSTEM 

What is Digestion???

Your body needs food and liquids in order for it to function and perform life processes. We can get energy from the food we eat. Digestion is when our body breaks down food into simpler and smaller substances, so that we can get the energy that we need!

Where does Digestion begin??? Why, your mouth!

MOUTH - This is where digestion begins. Your incisors, canines, and molars are the teeth in your mouth that chew and grind food up and send this type of fuel into your body. Your teeth create a bolus, which is a ball of food. The bolus is soften through saliva. The salivary glands, which are found in your mouth, create a watery fluid - you call this saliva - which moisten the bolus to send it down the esophagus.

ESOPHAGUS - Now onto the Esophagus! The bolus (what used to be called food) travels down the large, muscular tube called an esophagus to the stomach. Its function is to aid in this traveling process. It takes about 10 seconds to travel down!

STOMACH - Next stop...the Stomach! Food can be in the stomach for up to 5 hours. The Stomach can be considered a food processor and a holding spot for chewed and swallowed food. The gastric juices are secreted and mixed with food while in the stomach. Amazingly your stomach has the ability to expand and get smaller depending on how much food you take in!

SMALL INTESTINE -In here, food is absorbed and digested. The small intestine is a tubular organ that connects the stomach to the large intestine. Did you know that the small intestine is 22 feet long? Wow! As the partially digested food moves into the small intestine, it is combined with more digestive juices. Both the liver and the pancreas add in digestive juices, as well as the gall bladder. The small intestine is super important because this is where nutrients are absorbed to be used by the body.

LARGE INTESTINE - This is a large, thick tubular organ that removes all of the undigested waste from your body. The colon is part of the large intestine and is the widest part of the large intestine. Solid waste is then eliminated from your body.

ACTIVITY: 

**On an 8 1/2 by 11 sheet of paper, draw and label a detailed illustration of the digestive system. Include an outline of a body to show the system. Label each of the steps of digestion, along with the function and importance of each organs/step in the process. Drawing must include – the 3 additional organs (i.e. liver) that assist in digestion. Color each part of digestion a different color and include a key. 
On the back of your assignment, list the 3 sources you used to gather data, at least 2 must be online website/encyclopedia sources.

Looking for more information? Search here for more facts: http://www.annecollins.com/food-digestion-guide.htm

Wondering about the pathway for food? Watch here: http://www.medtropolis.com/VBody.asp

Digestive System: http://www.enchantedlearning.com/subjects/anatomy/digestive/

How digestion works: http://kidshealth.org/kid/htbw/digestive_system.html

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