UNIT 3: Esophagram Flashcards
Functions of the Digestive System
-INGESTION: taking in food and drink
-PERISTALSIS: contractual waves used to move food along digestive tract
-DIGESTION: convert food into chemical substances
-ABSORPTION: intake of chemical substances
-Ex: simple sugars, amino acids
-DEFACATION: elimination of indigestible solid substances
INGESTION
taking in food and drink
PERISTALSIS
contractual waves used to move food along digestive tract
DIGESTION
convert food into chemical substances
ABSORPTION
intake of chemical substances
Ex: simple sugars, amino acids
DEFACATION
elimination of indigestible solid substances
Key points about the oral cavity
-Teeth: 32 (molars, premolars, canine, incisors)
-Tongue: muscle with taste receptors for sweet, sour, salty
-Roof of oral cavity: hard and soft palate
-Mastication: chewing and grinding food into small pieces
-Salivary Glands: produce saliva that moistens and breaks down food:
-parotid
-sublingual
-submandibular
Mastication
chewing and grinding food into small pieces
Deglutition
act of swallowing
Pharynx
passageway for air and food
Valves that control passage of food
-Uvula
-Epiglottis
The esophagus is also known as
the gullet
The esophagus
-Hollow, muscular tube
-10 inches long, 3/4 Inch in diameter
-Extends from the pharynx (C6) to the stomach (T11)
-Transports food by gravity and peristalsis
Normal dents in the esophagus
Distal Esophagus
-Esophagus passes through the diaphragm at the esophageal hiatus (T10) and joins the stomach (T11)
-Cardiac antrum: expanded portion of the distal esophagus
-Cardiac orifice: opening between esophagus and stomach
-Cardiac sphincter: muscle controlling cardiac orifice