Digestive System

Digestive Organs Quiz #1

*Bony structures that grind and crush food mechanically into smaller bits:
Teeth
*Large tubular organ that absorbs water, salts, and stores waste matter:
Large Intestine
*Entrance of the digestive system where mechanical and chemical digestion begings:
Mouth
*Muscular tube that connects and carries food from the mouth to the stomach:
Esophagus
*Saclike, muscular organ that secretes gastric acids and churns food into a pulp:
Stomach
*Long tubular organ where most of chemical digestion & absortion takes place:
Small Intestine
*Organ that senses taste of food and hepls push it to the back of the mouth:
Tongue
*Glands that produce and secrete saliva which contains digestive enzymes:
Salivary Glands

Digestive Processes

*Movement of nutrient molecules through the wall of digestive system into the blood:
Absorption
*Production and release of useful substances (enzymes,hormones etc.) by a gland:
Secretion
*Process of eating i.e. taking food into the body through the mouth:
Ingestion
*Process by which body breaks down food into small nutrients that can be absorbed:
Digestion
*Process by which fat globules are broken into smaller droplets by bile salts:
Emulsification
*Process of eliminating waste products of metabolism (urine, CO2 etc.):
Excretion
*Rhythmic muscular contractions that moves food through the digestive tract:
Peristalsis
*Process of elimination of indigestible food remains from digestive system:
Egestion

Interesting Facts about Digestive System

*How much saliva does the human mouth produce everyday?1.7 liters!
*How many diffent species of bacteria are present in the human colon?Around 400!
*How long long does the food stay in the human stomach on average?3-4 hours
*How many functions does the liver perform in the human body?Over 500!
*How much hydrochloric acid does a human stomach produce everyday?2 liters!
*What are the nutrients that are absorbed in the esophagus?None
*How long does the food stay in the small intestine in humans?5 hours
*What is the average length of the small intestine in humans?22 feet!