Digestion
Is ingestion considered chemical digestion, physical digestion or both?
both
Most structures in the GI tract have _____ main layers.
4
What is the name of the muscular tube that connects the mouth to the stomach?
Esophagus
Which digestive organ has both mechanical and chemical digestion?
Stomach
___________________ physically breaking down food to increase surface area
Mechanical breakdown
The ___________ is the innermost layer of the GI tract. It secretes mucus, enzymes and hormones, and it absorbs nutrients into the blood.
mucosa
Which organ is responsible for the majority of nutrient absorption?
Small intestine
What structure prevents food from entering the trachea during swallowing?
Epiglottis
_____________ is the contraction and relaxation of smooth muscles in the esophagus, stomach, and intestines to move food through the canal.
Peristalsis
The ___________ is the middle layer of smooth muscle in the GI tract, and is critical for peristalsis.
muscularis externa
Which organ produces bile?
liver
Which organ aids digestion through enzyme production and regulates blood sugar via hormone secretion?
Pancreas
Chemical digestion is accomplished by secreting __________ to chemically break down food molecules into their simplest forms.
enzymes
The _________ is the outermost layer of loose connective tissue.
serosa
Which organ absorbs most of the water from indigestible food?
Large Intestine
Which part of the small intestine is the last section?
Ileum
List the six steps of digestion.
Ingestion, Propulsion, Mechanical breakdown, Chemical digestion, Absorption, Defecation
Stratified squamous epithelial cells are found in the ___________ to protect against abrasive foods.
mouth and esophagus
The finger-like projections in the small intestine that increase surface area are called:
Villi
Which organ stores, concentrates, and releases bile to aid in the digestion and absorption of fats
Gallbladder