1
Where does the first step of the digestive system take place?
Mouth
What is the function of the esophagus?
Transports food from the mouth to the stomach
Mixture of food and digestive juices
chyme
movement of food through the GI tract, begins with swallowing
propulsion
What is in saliva that begins the breakdown of carbohydrates?
Amylase
Name the MAIN digestive system organs in the correct order (Hint: 5 organs)
Mouth, esophagus, stomach, small intestine, large intestine
Breaking down of materials by breaking, tearing, crushing and mashing ?
mechanical digestion
If you were to lay them rolled out, which intestine is longer ?
Small
"digestion"; breakdown of larger molecules into smaller molecules
Chemical breakdown
What enzyme is in the stomach that digests protein?
Pepsin
What is the function of the small intestines?
Absorbs all the nutrients and sends it through to the rest of the body.
The breaking down of food into smaller pieces by chemicals like saliva or enzymes
chemical digestion
Name three accessory organs/tissues of the GI tract
gallbladder, liver, teeth, salivary glands, pancreas, appendix, lips, gums, tongue
movement of small molecules from the sm. intestines into the blood
Absorption
A gram of fat delivers how many calories
9
What is the main function of the large intestines?
Absorbs water and compacts the waste
Name 2 functions of the digestive system
Breakdown food into nutrients, and sends waste out of your body
What prevents food from entering the windpipe
Epiglottis
Expulsion of unabsorbed food
Defecation
What are the two functions of food?
Provide energy and building materials
Where does both mechanical and chemical digestion take place?
Stomach and mouth
What are the structures in the small intestine that absorb nutrients
Villi/microvilli (brushboarder)
What is the rhymical squeezing of the food in the digestive system called?
Peristalsis
taking in of food into the body
Ingestion
folds on the inside of the stomach
rugae