DIGESTIVE SYSTEM

TOUR THROUGH THE DIGESTIVE SYSTEM

• This tour will show you all the places
• Your food will travel once it is in your mouth
• And all the dangers that can be faced
• Now lets begin!!!

MOUTH

• Digestion starts here as soon as you take the first bite
• Then you start to chew, which breaks the food into pieces that are more easily digested
• Then your food is mixed with salvia to begin the process of breaking it down into a form your body can absorb
• But be careful because if you do not chew your food good enough, you can choke to death

THROAT

• Also called the pharynx
• Is the next destination for food you've eaten
• Then travels to the esophagus or swallowing tube

ESOPHAGUS

• It is a muscular tube extending from the pharynx to the stomach
• Just before the connection to the stomach there is the lower esophageal sphincter
• Which is a valve meant to keep food from passing backwards into the esophagus
• Then a series of contractions deliver the food to the stomach

STOMACH

• Is a sac like organ with muscular walls
• It secretes acid and powerful enzymes that continue the process of breaking down the food
• When it leaves the stomach, food is either a liquid or paste

SMALL INTESTINE

• Is made up of three segments, the duodenum, jejunum, and ileum
• The small intestine continues the process of breaking down food by using enzymes released by the pancreas
• It also moves food through and mixes it up with digestive secretions
• The duodenum is largely responsible for continuing the process of breaking down food
• While the jejunum and ileum are mainly responsible for the absorption of nutrients into the bloodstream

PANCREAS

• Secretes enzymes into the small intestine
• These enzymes break down protein, fat,
• And carbohydrates from the food we eat

LIVER

• Makes and secrete bile
• And to cleanse and purify the blood coming from the
• small intestine containing the nutrients just absorbed

GALLBLADDER

• Pear-shaped reservoir that sits just under the liver and stores bile
• Bile is made in the liver then travels to the gallbladder through a channel called the cystic duct
• During a meal, the gallbladder contracts, sending bile to the small intestine

COLON- LARGE INTESTINE

• The colon is a 6-foot-long muscular tube that connects the
• Large intestine to the rectum
• Is made up of the ascending, the transverse, the descending, and the sigmoid colon
• Waste left over is passed through the colon first as a liquid and then as a solid form
• A stool is stored in the sigmoid colon until emptied into the rectum

RECTUM

• 8-inch chamber that connects the colon to the anus
• Receives stool from the colon, to let you know there is stool to be evacuated, and to hold the stool until evacuation
• When gas or stool comes into the rectum, sensors send a message to the brain
• The brain then decides if the rectal contents can be released or not and then the muscles relax
• And then the rectum contracts, expelling its contents

ANUS

• Last part of the digestive system
• It consists of the pelvic floor muscles and the two anal sphincter
• The pelvic floor muscle has an angle between the rectum and the anus that stops stool from coming out
• The anal sphincters provide fine control of stool. The internal sphincter keeps us from going to the bathroom
• When we are asleep, while the external sphincter keeps the stool in until we are ready to use the restroom