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21 Cards in this Set
- Front
- Back
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Which section of the embryonic gut tube does the yolk sac maintain connection with?
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Midgut
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What germ layer is the tubular gut composed of?
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Endoderm surrounded by splanchnic mesoderm
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What forms at border of esophagus and pharynx?
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Respiratory diverticulum
- Forms lung bud |
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Where does the respiratory primoridum come from?
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Ventral surface of gut tube
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Which part of the GI tract is not enveloped by a coelom?
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Esophagus
- Incorporated into dorsal wall of pleuroperitoneal cavity though, so winds up in mediastinum |
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Which way is the first rotation of the stomach?
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Longitudinal
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Which way is the second rotation of the stomach?
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Dorsoventral
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Three things the dorsal mesogastrium forms
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- Greater omentum
- Omental bursa - Spleen |
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Two things the ventral mesogastrium forms
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- Lesser omentum
- Falciform ligament |
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What divides the cloaca into urinary bladder and anorectal canal?
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Urorectal septum
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A narrowing of the lumen in a localized area
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GI stenosis
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Occurs when the lumen is completely obliterated in a single localized area
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GI atresia
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Complete absence of ganglia in myenteric plexus
- Results in no persistalsis and death within a few days of birth |
Aganglionic LI in horses
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Failure of anal membrane to break down and/or remain patent
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Atresia ani
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Condition where organ systems are reversed in body forming a mirror image
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Situs inversus
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Abnormal connection between portal vein and caudal vena cava
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Portosystemic shunt
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Order that the atrial portions are formed in.
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Septum primum
Ostium primum Ostium secundum Septum secundum Foramen ovale Valve of the foramen ovale |
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What is the foramen ovale a hole in?
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Septum secundum
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What is the foramen secundum a hole in?
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Septum primum
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What is the Valve of the Foramen Ovale composed of?
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Septum primum
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What germ layer of the fetus do blood vessels form in?
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Mesoderm
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