Digestive System 26.1 (Overview of Digestive System) Flashcards
the digestive system consists of two categories
GI organs and Accessory Organs
different names for the digestive tract include
GI tract and alimentary canal
The GI tract organs include
esophagous,oral cavity,pharnyx,stomach,small intestine and large intestine, anus
Accessory Organs Include
Liver, Gallbladder,Teeth,Tongue, and Pancreas
The GI tract is lined with
mucous membrane
The lumen is where ___occurs that are absorbed
ingested food is broken down
Accessory Digestive Organs help with
breakdown of food
Accessory Digestive Glands
secrete into lumen
Liver,Salivary Glands, and Pancreas are
Accessory Digestive Glands
Accessory Organs include
Teeth , Tongue, Liver, and Gallbladder
The teeth and tongue
chews and swallows food
Gallbladdes
stores bile that is produced by the liver
The six main functions of the digestive system
ingestion, motility ,secretion, digestion ,absorption ,elimination
What structures have tunics?
Esophagous ,Stomach,Small Intestine,Large Intestine
What are the four tunics
mucosa ,submucosa ,musclaris ,adventitia or serosa
The mucosa is the
inner lining mucous membrane
What are the three components of the Mucosa
Epithelium ,Musclaris Mucosae ,Lamina propa
The epithelium within the mucosa has what type of epithelium for the stomach to large intestine
Simple Columnar
Simple Columnar allows for
secretion and absorption
Lamina Propa has
areolar connective tissue
Lamina propria contains blood and lymph vessels and small branch nerve cells
Musclaris Mucosae is next to
submucosa
Musclaris Mucosae functions
contracts smooth muscles that secrete things from the mucosa into lumen and increase absorption
Submucosa composed of
areolar and dense irregular connective tissue
blood and lymph vessels,nerves,and glands
Submucosal Nerve Plexus innervates
smooth muscle and glands of the mucosa and submucosa
The musclaris is composed of
smooth muscle tissue
The Myentirc nerve plexus
control contractions of muscularis
What two layers are in the musclaris
inner circular and outer longitudial
The function of the muscluaris is motility
motility
The inner circular layer
constircts the lumen
The outer longitudal layer
shorten tube
