mouth
What softens food here?
saliva
Where is the esophagus located in the digestive tract?
it is the next step after the mouth (moves food from mouth to stomach)
hydrochloric acid
what is the small intestine also known as?
duodenum
the liver turns glucose into what here?
glycogen
What is the enzyme in saliva?
ptyalin
How long is the esophagus?
12 inches long
What enzyme is in the stomach?
pepsin
What helps filter and absorb materials in the small intestine?
villi
What does the liver recycle?
iron and worn out blood cells
What are the two types of carbohydrates that are broken down in the mouth?
complex and simple
What moves food down the esophagus?
peristaltic waves
How long does it take for solids to be digested in the stomach?
4 hours
How long does food stay here
2-9 hours
When does the digestive system begin?
Before food enters the mouth (saliva is produced before food enters the mouth)
What are three parts of the mouth?
options are: lips, soft palate, palatine tonsil, molars, tongue, incisor, canine, premolar, papillae of tongue, and uvula
How long does food stay in the esophagus?
4-6 seconds
What nutrient stays in the stomach the longest?
fat
Food is mixed and combined with chemicals from the liver and pancreas here. What are the names of the chemicals?
What is the large intestine also known as?
Colon
How many kilograms of food enters the average human's mouth in a day?
(from video) 1-2.7kg/ day
What does the esophagus prevent from happening?
reflux
How should you eat in order to move food through the stomach more easily?
chew foods thoroughly- larger pieces don't leave the stomach easily
Carbohydrates: glucose
Fats: fatty acids
Proteins: amino acids
Vitamins & minerals: stay the same
How long does it take for food to exit the system after entering?
30-40 hours