biology and cancer test Flashcards
What is the purpose of the digestive system?
What are the two types of digestion?
Chemical, Mechanical
What is the substance called that gets passed through the esophagus
Bolus
Where does digestion start?
The mouth
Which organs allow nutrients to be absorbed
Small and large intestine
What organs break down food mechanically?
Mouth and stomach
What organ stores waste until it gets removed
Large intestine
What is peristalsis?
Muscular contractions that move food through the systems
When the food exits the stomach called?
Chyme
Explain the digestive system with detail
Mouth: Digestion starts here. The food gets chewed up mechanically with the help of saliva. Once it exits the mouth and enters it’s called bolus.
Esophagus: The bolus is moved through the esophagus using peristalsis until it reaches the stomach.
Stomach: it uses muscles and acids to turn the bolus into chyme which is then pushed through into the small intestine.
Small intestine: Using the help of the bile produced by the liver, the intestine moves the chyme through the intestine using peristalsis. This is where the first part of nutrient absorption begins.
Large intestine: When the chyme enters the large intestine, it starts to form the chyme into the poop shape that leaves the anus.
What is bile?
a substance that leaves the gall bladder from the liver to de acidify the chyme and to also help break down the fats in the chyme more.
What is alveoli
It’s at the end of the lungs and contains millions of air sacs for gas exchange.
What is the bronchiole?
The small tubes that branch of the bronchus. They lead to the alveoli.
What is the trachea?
The tube that leads to the lungs.
What takes the blood through the lungs to transfer the o2
Capillaries
