Digestive System Flashcards
(145 cards)
Functions of Digestive System
Take in Food Breakdown food absorb digested molecules provide nutrients Eliminate waste
Two Main Divisions/Groups
Digestive/Gastrointestinal Tract/ Alimentary Canal
Accessory Digestive Organs
Alimentary Canal
mouth pharynx esophagus stomach small intestine large intestive anus
Accessory Organs
teeth tongue salivary glands liver pancreas gallbladder
Basic Tissue layers/tunics of GIT
Mucosa
Submucosa
Muscularis
Serosa
innermost tunic
mucosa
3 layers of mucosa
mucous epithelium
lamina propria
muscularis mucosa
thick layer of loose connective tissue;nerves, blood vessels
submucosa
contains nerve plexus and submucosa plexus = enteric plexus
control movement and secretion of the tract
Muscularis
outermost layer
composed of peritoneum, underlying connective tissue
serosa
a double sac serous membrane that covers the wall of the abdominal cavity and abdominal organs
peritoneum
covers the organ
visceral peritoneum
lines the wall of the abdominal cavity
parietal peritoneum
connective tissues that are held in place many organs of the abdominal cavity
nerve and blood vessels enter peritoneal cavity
mesenteries
Organs of Alimentary Canal
Mouth/ Oral cavity Pharynx Esophagus Stomach Small Intestines Large Intestines
first part of digestive tract bounded by lips and cheeks
mouth
Associated structures of mouth
lips cheeks hard palate soft palate tongue teeth
muscular structure that is covered by the skin at the outer surface
lips
muscles in lips
orbicularis oris
forms the lateral walls of the oral cavity
cheeks
muscles in cheeks
buccinators
the bony roof of mouth; palatine rugae
hard palate
forms the posterior roof of the mouth composed of skeletal and connective tissue
closes nasopharynx when swallowing
soft palate
large, muscular organ that occupies most of the oral cavity
most powerful organ
aids in articulation
tongue