ANIMAL NUTRITION AND DIGESTIVE SYSTEM 3 Flashcards
is the point of entry of food into the digestive system
Oral Cavity
is a watery substance produced in the mouths of many animals
Saliva
There are three major glands that secrete saliva
the parotid, the submandibular, and the sublingual
Saliva also contains an enzyme called ______ that begins the process of converting starches in the food into a disaccharide called ______
salivary amylase
maltose
Another enzyme called ______ is produced by the cells in the tongue
lipase
leads to the lungs
trachea
leads to the stomach
esophagus
The trachea has an opening called the
glottis
covered by a cartilaginous flap called the
epiglottis
When swallowing, the epiglottis _____ the glottis and food passes into the _______ and not the _________
closes
esophagus
trachea
a tubular organ that connects the mouth to the stomach.
esophagus
The smooth muscles of the esophagus undergo a series of wave like movements called _______ that push the food toward the stomach
peristalsis
The peristalsis wave is _______—it moves food from the mouth to the stomach, and reverse movement is not possible.
unidirectional
A ring-like muscle called a _______ forms valves in the digestive system.
sphincter
located at the stomach end of the esophagus.
gastro-esophageal sphincter