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Anatomy Exam 3

GI Tract Development

QuestionAnswer
What are the 3 regions of the gut Foregut, Midgut, Hindgut
Contains the abdominal esophagus, stomach, proximal duodenum, liver, pancrease, gallbladder, spleen Foregut
Contains the distal duodenum, jejunum, ileum, cecum, appendix, asceding colon, proximal 2/3 transverse colon Midgut
Contains the distal 1/3 transverse colon, descending colon, sigmoid colon, rectum Hindgut
The regions of the gut are differentiated based upon Their blood supply
The foreguts gets its main blood supply from the descending aorta via the Celiac trunk
What are the 3 main branches of the celiac trunk Splenic, Left Gastric, Common hepatic
What two branchs off the Splenic Short gastric aa, Left gastroomental
What does the Splenic artery supply Spleen
What do the short gastric aa supply Fundus of stomach
What does the Left gastroomental a supply Greater curvature of stomach on the left hand side
What does the Left gastric Lesser curvature of the stomach on the left hand side
What two branches does the Common hepatic a give off Proper Hepatic, Gastroduodenal
The proper hepatic artery gives of what three branchs Right and Left Hepatic aa and Right gastric artery
What do the right and left hepatic aa supply Liver
What does the right gastric a supply Lesser curvature of the stomach on the right hand side
The Right gastric a anastomoses with what Left gastric a
What branches does the gastroduodenal a give off Right Gastroomental and Pancreaticoduodenal
What does the Right gastroomental a. supply Greater curvature of the stomach on the right hand side
The right gastroomental a anastomoses with what Left gastroomental a
The Pancreaticodoudenal a usually has what two branches Superior and Inferior
The Midgut gets its main blood supply from the descending aorta via the Superior mesentaric a
The five main branches of the superior mesentaric a are Middle Colic, Right Colic, Ileocolic, Jujenal aa., Ileal aa.
The Middle Colic a supplies the Transverse colin
The Middle Colic a gives of the Marginal a
The Right Colic a supplies the Ascending colin
What does the Right Colic a anastomose with Marginal a.
What does the Ileocolic a supply The Ilium and Colin
What are the branches of the Ileocolic a Posterior cecal and Appendicular
What does the Posterior cecal a supply The posterior part of the cecum
What does teh Appendicular a supply The Appendix
What do the jujunal aa supply Jejunum
What do the Ileal aa supply Ilium
The Jejunal and Ileal aa split into Loops and arcades, vasa recta
What is the character of vasa recta in the ileum Short
What is the character of the vasa recta in the jejunum Long
Which has more arcades the Ilium or the Jejunum Ilium
The hindgut receives its major blood supply from the descending aorta via the Inferior Mesenteric a
The inferior mesenteric a gives off what branches Left Colic, Sigmoid a, Superior rectal
What does the Left Colic a supply Most of the descending colin
What branch does the Left Colic a give off Marginal
The left marginal artery anastomosis with what Middle Colic
What doe the Sigmoid aa supply Sigmoid colin and lower part of descending colin
What does the superior rectal a supply Rectum
What are the two sets of venous drainage in the abdomen Caval circulation and Portal circulation
What does the caval circulation drain Structures associated with teh abdominal wall; kidneys, gonads, Musculature
Where does the caval circulation drain into Inferior vena cava
What does the portal circulation drain Structures associated with the gut tube
Where does the portal circulation drain Liver
What do the inferior phrenic vv drain Diaphragm
What do the renal vv. drain Kidneys
Which renal vein is typically a little longer Left
What do the gonadal vv drain Gonads
Where does the righ gonadal v drain into Inferior vena cava
Where does the left gonadal v drain into Left Renal v
What do the common iliac vv drain Lower limb and some pelvis
What do the lumbar vv drain Musculature of lumbar region
What does the median sacral v drain Sacrum
What forms the Portal v Splenic and Superior Mesenteric v.
What does the Superior mesenteric v. drain Much of the large intestine and bits of the small intestine
What does the Splenic v. drain Spleen, Stomach, Pancreas
What also drains into the portal v Left and right gastric v
What drains into the splenic vein Inferior mesenteric v
What does the inferior mesenteric v drain Descending colon
What drains into inferior mesenteric v Superior rectal v
What caval veins does the Left gastric vein anastomose with Sumbucosal Esophageal veins
What caval vein does the Superior Rectal vein anastomase with Middle Rectal vein
What caval veins do the small veins around the ligamentum teres anastomose with Superficial abdominal veins
Veins draining the posterior aspects of retroperitoneal organs anastomoase with Retroperitoneal veins draining the posterior abdominal wall
In the embryo what lines the gut tube Endoderm
Tissue that covers the gut tube is called Peritoneum
A double layer of peritoneum that attaches the gut tube to the body is called Mesentery
What attaches the gut tube to the dorsal body wall Dorsal Mesentery
What attaches the gut tube to the ventral body wall Ventral mesentary
Most of the GI tract is surrounded by peritoneum making it Intraperitoneal
Some organs have only the anterior surface covered by peritoneum making them Retroperitoneal
During forgut development what grows from the dorsal portion Dorsal portion of stomach, spleen, pancreas
Dorsal mesenterery becomes what Greater omentum
During forgut development what grows from teh ventral portion Ventral portion of stomach, Liver, Gallbladder
Ventral mesentery becomes what Lesser omentum
During forgut development what happens first Anterior-Posterior Out growths
During forgut development what happens second The stomach rotates 90 degrees clockwise
The greater omentum forms the boundary of the Omental bursa
The lesser omentum covers the Lesser sac
What is the opening of the lesser sac called Omental foramen
Is the first part of the duodenum intraperitoneal or retroperitoneal Intraperitoneal
The transition to the midgut is where what duct enters into the duodenum Common bile duct
The liver and gallbladder develop from the foregut as the Hepatic Diverticulum
The pancrease develops from the dorsal and ventral pancreatic buds that eventually fuse to form the Definitive process
The spleen develops withing the dorsal Mesogastrium
The foregut undergoes a ... degree clockwise rotation 90
During embryoligic development the midgut elongates and extends out to the Umbilical cord
During development the midgut rotates 90 Counterclockwise
During development after the first rotation the midgut tube begins to Return to the abdominal cavity
During development after it returns to the abdomin the midgut rotates another 180 degrees counterclockwise
During development when the midgut is rotating if the superior mesentaric artery or its brnaches become compressed it is called Volvulus
During development if part of the gut tube remains sticking out of the body wall it is called Gastroschisis or Omphalocele
What common tube differentiates into the UG and GI systems Cloaca
Most of the innervation of the gut is mostly Autonomic
The sympathetic nerves that innervate the the gut are the Greater, Lesser, Least and Lumbar splanchnic nn
The parasympathetic nerves that innervate the gut are the Vagus and Pelvic splanchnic nn
What is the sympathetic innervation for the foregut Greater splanchnic n
What is the parapympatheticn innervation for the foregut Vagus
What are teh visceral afferent for the foregut T6-T12
What is the sympathetic innervation for the Midgut Lesser and Least splanchnic nn
What is the parasympathetic innervation for the midgut Vagus
What are the visceral afferents for the midgut T8-T12
What is the sympathetic innervation for the hindgut Least splanchnic nerve
What is the parasympathetic innervation for the hindgut Pelvic splanchnic n
What are visceral afferents for the hindgut T12-S4
Created by: mhaynes