Function

• The function of the digestive system is to break down food we eat into smaller parts so the body can use them to build and nourish cells and provide energy for our body.

Stomach

• J-shaped bag behind left lower rib.

• 12 in around the long side.

• Muscle layers squeeze to mash food.

• Holds three pints of drink and food.

• Takes in/absorbs few nutrients that include sugar.

• Makes mugus to protect itself from digesting self.

Picture of Stomach

Small Intestine

• Average width is 1.1-1.3 has three main parts.

• Duodenum which is 10 inches

• Jejunum which is 88 inches

• Ileum which is 118 inches

• Inner surface has many folds called picae

• Receives digestive juices from pancreas and liver.

Picture of Small Intestine

Large Intestine

• Average width 2.3-2.7 inches

• First part is wide and has appendix and is called caecum.

• Second part is ascending colon

• Third part is transverse colon

• Fourth is sigmoid

• Takes in water/ body salt and food

Picture of Large Intestine

Liver• The largest single organ inside the human

body.

• Wedge shaped, dark red color

• Typical weight 3.3 lbs. depth at widest part on right side 6 inches

• Has a large right lobe and small left lobe.

• Lobes separated by a strong layer is the falciform ligament

• Interesting fact- if you remove a damaged part of the liver it can regenerate unlike any other organ.

Picture of Liver

Gall Bladder

• Small pear shape organ that stores and concentrates

• 3 to 4 inches long

• 1 inch wide

• Stores bile and concentrate

• Bile emulsifies fat and neutralize acid.

Picture of Gall Bladder

Pancreas

• Glandular organ that secretes digestive enzymes

• Yellow

• 7 inches long 1.5 inches wide

• Produces enzymes

• Digest food and breaks down protein, fat, and starch

Picture of Pancreas

Extras

• Anus- solid waste passes from the rectum in order to leave your body

• Mouth- When food is chewed saliva starts digesting carbohydrates.

• Esophagus- muscles in a process called peristalsis push the food down into your stomach.

• Rectum lower part of the large intestine where feces are stored before they are excreted from the body.

Villi and Micro Villi

• One of the numerous vascular projections of the small intestine.

• Have finger like hairs move food.

• a microscopic projection of a tissue, cell, or cell organelle; especially any of the fingerlike outward projections of some cells surfaces.

Diseases

• Alcohol induced liver disease-First, you must stop drinking. Your doctor may suggest changes in your diet and certain vitamin supplements to help your liver recover from the alcohol-related damage. Alcohol-induced liver disease, as the name implies, is caused by excessive consumption of alcohol and is a common, but preventable, disease.

Diseases

• Gallstones-If you have gallstones without symptoms, you do not require treatment. If you are having frequent gallbladder attacks, your doctor will likely recommend you have your gallbladder removed. Gallstones are small, pebble-like substances that develop in the gallbladder. Gallstones form when liquid stored in the gallbladder hardens into pieces of stone-like material

Diseases• Acute and Chronic Hepatitis-When a person is first

infected with the hepatitis B virus, this is called an "acute infection". A person may not have any symptoms or she/he could become seriously ill. Most adults will recover and get rid of the virus without any problems. If the virus remains in the blood for more than six months, then a person is diagnosed as having a "chronic infection".

• Fortunately, most healthy adults (90%) who are infected with the hepatitis B virus will recover and develop protective antibodies against future hepatitis B infections.

• Unfortunately, this is not true for infants and young children — 90% of infants and up to 50% of young children infected with hepatitis B will not get rid of the virus and will develop a chronic infection. A smaller number of infected adults (5-10%) will also become chronically infected with hepatitis B. 

Diseases

• Drug induced liver disease-Drug-induced liver diseases are diseases of the liver that are caused by physician-prescribed medications, over-the-counter medications, vitamins, hormones, herbs, illicit ("recreational") drugs, and environmental toxins-The most important treatment for drug-induced liver disease is stopping the drug that is causing the liver disease.

What will happen?

• If your digestive system fails you will suffer and possibly die from malnutrition.

Systems that it compliments

The digestive system can work with other systems in different ways. Lets give the example of the liver. The liver does send nutrients around the body after the small intestines absorb the nutrients and give it to the liver. The liver needs the help of the circulatory system do it. So the blood vessels of the liver help the liver give the nutrients to the body.

Vitamin K

• Needed for: Blood, Clotting and General Health.

Vitamin C

• Needed for: Teeth, Gums, Bones, Blood, Fighting Diseases, Skin and General Health.

Vitamin D

• Needed for: Bones, Teeth, Nerves, Heart and General Health.

Relations• Circulatory system- helps circulate the

blood throughout the body• Well the digestive system breaks down the

flood that flows through the circulatory system to the muscular system which provides movement to consume more food.

• Nervous system gets a signal when you are hungry.

• Foods are pulled down the digestive system by the muscular system.

Relations Continued

• Secretary system brakes down and coats the food so the muscles don’t have to strain when receiving food down the digestive system.

Sources

• http://www.hepb.org/patients/• www.google.com• www.bellaonline.com• “The Human Body”