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Digestive System
Digestive System Vocabulary Words
20
Science
5th Grade
05/05/2013

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Term
Gastric Juice
Definition

Digestive fluid in the stomach.  It is a mixture of enzymes and acids that chemically break down protein.

Term
Digestion
Definition

The process by which food is broken down into substances that can be used by the cells of the body.

Term
Large Intestine
Definition

The wider, shorter part of the intestines. Absorbs water and salts out of the remainder of the food before being excreted.

Term
Rectum
Definition

Where the remaining solid wastes (called feces) are stored until they are expelled from the body.  This is the end of the digestive trail, no further digestion takes place here.  

Term
Tongue
Definition

Helps to push food to the back of the mouth to be swallowed.

Term
Appendix
Definition

A little pouch located where the small intentine joins the large intestine.


It has no known purpose in our bodies, but it can sometimes become infected and have to be removed.

Term
Enzymes
Definition

Substances that speed up chemical reactions.


For example: in saliva, they help pto break down large starch molecules into smaller molecules of sugar.

Term
Intestinal Juice
Definition

Works with pancreatic juice to chemically break down food.  It is made in the walls of the small intestine.

Term
Saliva
Definition

Secretion from the salivary glands that softens and lubricates the food in your mouth.

Term
Villi
Definition

Tiny, finger-like structures that line the inner wall of the small intestines.


Nutrients from the digested food enter the bloodstream here and are carried to the cells of the body.

Term
Peristalsis
Definition

Contraction and relaxation of the musclues in the esophagus.  This muscular action that helps to move food through the rest of the digestive tract.



Term
Esophagus
Definition

Muscular tube that connects the mouth to the stomach.

Term
Mechanical Digestion
Definition

One of the 2 kinds of digestion. Occurs as the food is broken down into smaller pieces.


Example: when chewing, your teeth mechanically digest the food in your mouth.

Term
Small Intestine
Definition

A very long, coiled, tube-like organ where nutrients are absored into the bloodstream.

Term
Bile
Definition

A type of digestive liquid. It is produced in the liver and breaks down fat in foods.

Term
Chemical Digestion
Definition

One of the 2 kinds of digestion. It is the process by which foods are chemically changed into simpler substances.


Example: when gastric fluids in the stomach are added to food to break down protein.

Term
Salivary Glands
Definition

Produces saliva, which is added to the food while still in your mouth.



Term
Gall Bladder
Definition

A storage sac. It holds the bile that is produced in the liver.

Term
Pancreas
Definition

Produces another type of digestive juice: pancreatic juice.  It works together with intestinal juice to chemically break down food in the small intestine.

Term
Stomach
Definition

A J-shaped organ that stores and further digests food. Gastric juices are added to the food to chemically break it down further.  3 layers of muscles help to churn the food.


It is protected from the strong digestive juices by a layer of mucus.  Food remains here from 4 to 6 hours.

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