A&P Digestive Anatomy Flashcards
Name of groups of the digestive system
Alimentary canal and Accessory digestive organs
Alimentary canal performs what digestive functions
ingests, digests, absorbs and defecates
Accessory organs are what and do what
teeth, tongue, and large digestive glands and they assist
Alimentary canal is AKA
GI tract
Alimentary canal is what?
Coiled hollow muscular tube that starts at the mouth and ends at the anus
What organs, in correct order, are a part of the alimentary canal?
mouth, pharynx, esophagus, stomach, small intestine and large intestine
Mouth is AKA
oral cavity
Mouth is lined with?
mucus membrane
Anatomy of the mouth
lips protect net rigor opening
cheeks form lateral walls
hard palate forms anterior roof and
soft palate forms roof
uvula is?
fingerlike projection of the soft palate
Vestibule is:
the space between lips, cheeks and teeth
Area contained by teeth is called
oral cavity proper
lingual frenulum is?
fold of mucus membrane that secures tongue to floor of mouth and limits posterior movements
Pharynx contains what two parts
oropharynx and laryngopharynx
Mouth passes food from where to where
into the oropharynx into the laryngopharynx
esophagus runs from where through to where
from pharynx through the diaphragm to the stomach
Esophagus is essentially a
passageway that conducts food to the stomach
Four layers that make up the walls of the esophagus and stomach
1) mucosa
2) submucosa
3) muscularis externa
4) serosa
Mucosa
innermost layer that lines ST and Eso. Lumen. consists mainly of surface epithelium, small amount of connective tissue and a scanty smooth layer
submucosa
found just beneath mucosa and is a soft CT layer, containing blood vessels, nerve endings, MALT and lymphatic vessels
muscularis externa
muscular layer made up of inner circular and outer longitudinal layer of smooth muscle
serosa
outer most layer of the wall, single flat layer of serous fluid producing cells known as the visceral peritoneum. Connected to the silpery parietal peritoneum which line the ab cavity
Alimentary canal wall contains two important intrinsic nerve plexuses
Submucosal nerve plexus
myenteric nerve plexus
part of ANS and help regulate mobility and secretory activity of GI tract
Stomach is ________ shaped
C
Stomach sits on the _____________ side of the AB cavity
left
Chyme is
simifluid mixture that results from the stomach breaking food down into small particles and mixing it with gastric juice
chyme leaves the stomach and enters the ________ by passing through the ______ ______
duodenum and pyloric sphincter and greater curvature