Tubular GI Flashcards
Most of the alimentary system is contained in the abdominal region of the _____?
abdomino-pelvic cavity
where does the esophagus extend?
between the pharynx and the stomach
where the esophagus begin and end?
in the neck; travels through the thorax and enters the abdomino pelvic cavity connecting to the stomach
what does the stomach join too?
the small intestine
what does the small intestine join too?
the large intestine
where does the large intestine end and what does it join?
pelvic cavity; rectum which is continuous with the anus and so this strucuture has the anal canal that serves as the passageway for feces to exit
how is the GI tract organized? blood supply?
into the foregut, midgut and hindgut; they each have their own
what are the structures of the foregut?
esophagus
stomach
proximal duodenum
(accessory organs: liver, gallbladder, pancreas)
what are the structures of the midgut?
distal duodenum
jejunum/ileum
proximal 2/3 of large intestine
what are the structures of the hindgut?
distal 1/3 of large intestine
sigmoid colon
rectum
what is the arterial supply to the foregut?
celiac trunk
what is the arterial supply to the midgut?
Superior mesenteric artery, comes off aorta and branches wildly
what is the arterial supply to the hindgut?
Inferior mesenteric artery
each of these arteries is an unpaired branch of the _____?
abdominal aorta
HOW DOES FOOD MOVE THROUGH THE GI TRACT?
The abdomen may be divided into 4 quadrants: upper and lower right, upper and lower left.
Food enters the abdomen in the upper left quadrant, moves toward the upper right, then back to the upper left. It then follows the coils of the small intestine that generally moves the food in a direction of upper left to lower right, where it enters the large intestine.
where does digestion begin?
stomach
A valve at the distal end of the stomach prevents food from moving out of the stomach until it has been thoroughly processed. The valve is at the _____ end of the stomach?
pyloric
pyloric antrum is also equal too?
entry way to the pyloric canal.
pyloric canal is also equal too? where does this canal lead?
passageway through the pyloric valve. The canal leads to the duodenum.
what is the membrane attached to the greater curvature of the stomach?
greater omentum
what is the membrane attached to the lesser curvature of the stomach?
lesser omentum
what are the important landmarks of the stomach?
Cardia Body Fundus Pyloric antrum Pyloric canal Greater curvature Lesser curvature
how long is the small intestine?
approximately 6-7 m long
where does the small intestine begin and end?
It begins at the pylorus and ends at the cecum
what does the small intestine contain?
duodenum, jejunum and ileum
what is the shortest segment of the small intestine?
duodenum
where does the jejunum begin?
duodenal jejunal flexure (junction)
T/F, The small intestine occupies all four quadrants of the abdominal cavity?
T
what quadrant is the jejunum located?
upper right and left quadrants whereas the ileum is located in the lower left and right quadrants