Digestive System Flashcards
What are the four types/stages of Digestion?
Ingestion: Take in
Digestion: Break down
Absorption: Nutrients become absorbed into the body
Elimination: Waste is excreted out.
What is the FUNCTION of the Digestion system?
It is to break food down into smaller particles that can be absorbed into the circulatory system, and excrete the remaining waste.
How long is the Digestive (GI) tract?
6.5 - 9m long.
How long does it take to complete a cycle in the digestion system?
Roughly 24-33 hours.
What are the main organs in the digestive system?
Mouth, Esophagus, Stomach, Small & Large intestine and the Anus
What are the accessory Organs to the digestive system.
They mainly supply enzymes to help break down food during the process:
Liver, Gallbladder (store bile) and Pancreas to name a few.
What are the two types of Digestion that occurs in the mouth?
STRUCTURE ALWAYS MATCHES FUNCTION
Mechanical (teeth physically mash food).
Chemical (Saliva has enzymes that mechanically break down the chemical structures of the food you’re eating).
What special teeth do beavers have?
Chisel teeth. AKA INCISORS
What teeth is common in Herbivores?
Grinding teeth because they don’t rip into flesh.
What do the tusks in elephants do?
They act as weapons.
What are the 4 teeth humans have?
Incisors, Canine, Premolar and molar.
What do they do (in order)?
Incisor: Bite/cut
Canine: Tear
Premolar: Grind
Molar: Crush
What is saliva made of?
Water, Mucous and Amylase.
It breaks carbs into Glucose
How does the esophagus move food down.
Peristalsis. Basically pushes food down in a wave motion (works with Gravity).
Epiglottis?
Flap that separates food from going into lungs.
