mortality/aging
cardiovascular system
• abnormalities of the heart and abnormalities of the great vessels related to aortic arch patterning defects similar to those seen in offspring of vitamin A deficient rats were seen in these mice at E18.5
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• the right dorsal aortic root that is normally lost persists (2 out of 5)
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• the right 4th aortic arch that normally persists is lost (2 out of 5)
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• dextroposed ascending aorta - the aorta originates from the right ventricle (2 out of 5)
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• associated with dextroposition of the aorta, defects are also found in the membranous portion of the ventricular septum but not in the muscular portion of the septum (3 out of 5)
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• associated with the defect in aortic morphology the aortic valve has 4 cusps
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endocrine/exocrine glands
• the parathyroid glands were rostrally displaced and not associated with the thyroid gland
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renal/urinary system
• the kidneys are smaller than normal due to bilateral hypoplasia however division of the kidney into cortical and medullary regions is still present (2 out of 5)
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respiratory system
• multiple defects in the cartilages that make up the skeleton of, the trachea, the extrapulmonary bronchi, and the larynx were found at E18.5
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• the arytenoid cartilage is smaller than normal (11 out of 11)
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• the shape of the cricoid cartilage is abnormal (11 out of 11)
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• the cricoid cartilage is abnormally fused to the tracheal rings (11 out of 11)
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• the thyroid cartilage is smaller than normal (11 out of 11)
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• detailed examination revealed that the cartilages in the caudal portion of the stem bronchi are fused (11 out of 11)
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• the tracheal cartilage rings are absent and are replaced by ventral cartilage and cartilaginous nodules (11 out of 11)
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skeleton
• the arytenoid cartilage is smaller than normal (11 out of 11)
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• the shape of the cricoid cartilage is abnormal (11 out of 11)
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• the cricoid cartilage is abnormally fused to the tracheal rings (11 out of 11)
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• the thyroid cartilage is smaller than normal (11 out of 11)
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• the tracheal cartilage rings are absent and are replaced by ventral cartilage and cartilaginous nodules (11 out of 11)
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craniofacial
• the right 4th aortic arch that normally persists is lost (2 out of 5)
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embryo
• the right 4th aortic arch that normally persists is lost (2 out of 5)
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