The Digestive System

What is the digestive system composed of?

the (Gastrointestinal tract) GI Tract

What is the GI tract?

a long continual tube that starts with your mouth and ends with the anus

What is the GI tract divided into?

• Mouth

• Pharynx

• Esophagus

• Stomach

• Small intestine

• Large intestine

• Rectum

Where does the digestion of food begin in?

the mouth, when you chew and mechanically digest, that is the physical breakdown of food

What lubricates the food and enzymes with things like amylase and lipase

Mucus and Salvia, initiating chemical digestion of starches and lipids

Where is food stored that initiates chemical digestion with enzymes?

the stomach

What kills bacteria and denatures any type of protein, and activates those digestive enzymes?

Gastric Acid

What is the main site of digestion as well as absorption?

Small intestine

What is composed of the duodenum, jejunum, and ilum?

small intestine

What is coiled and has a series of foldings that increase the surface area for absorption?

the small intestine

What is composed of the secum, colon, and the rectum?

The large intestine

What absorbs water, electrolytes, and vitamins produced by the enteric bacteria that located in there?

the large intestine

What is the final section of the GI tract

the rectum

What stores the feces until it is ultimately eliminated through defecation?

the rectum

What do the accessory organs include in the GI tract?

• teeth

• tongue

• salivary glands

• liver

• gallbladder

• pancreas

  These all work together to help with the digestion of food

What do the teeth, tongue, salivary glands, liver, gallbladder, and pancreas help break down?

the smaller pieces in the body and also helps absorb nutrients along the way

What includes the enzymes and hormones of the digestive system?

• Gastrin

• Cholecytokinin (CCK)

• Secretinn

• Insulin

• Glucagon

• Bile

According to the enzymes and hormones of the digestive system, where is gastrin produced?

in the stomach and stimulates stomach acid

According to the enzymes and hormones of the digestive system, where is Cholecystokinin (CCK) produced?

In the small intestine, and stimulates the release of enzymes from the pancreas and bile from the liver

According to the enzymes and hormones of the digestive system, where is secretin produced?

in the small intestine and stimulates the production of bicarbonate by the pancreas

According to the enzymes and hormones of the digestive system, where is insulin produced?

produced in the pancreas and regulates blood sugar levels

According to the enzymes and hormones of the digestive system, where is glucagon produced?

produced in the pancreas and helps to release glucose from the liver

According to the enzymes and hormones of the digestive system, where is bile produced?

By the liver and stored in the gallbladder, it helps break down fat in the small intestine