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26 Cards in this Set
- Front
- Back
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as embryo elongates cranially and caudally...
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Head and tail forms
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The foregut lies b/w the ___ and ___ and is the primordium of (2 structures)
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Lies b/w the brain & heart and is the primordium of the pharynx adn esophagus
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After folding the septum transversum develops into...
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the central tendon of diaphragm
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Embryonic coelom is the primordium of...
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the body cavities
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stomodeum is the primordium of
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the mouth
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Folding of caudal end results primarily from growth of...
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distal part of neaurl tube (primordium of spinal cord)
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The hindgut is primordium of
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descending colon
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Terminal part of the hindgut dilates slightly to form ____ which is the primoridum of ____.
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Cloaca, primordium of urinary bladder and rectum
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connecting stalk is primordium of
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umbilical cord
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The proximal part of allantois persists as a stalk called ____ (extends from bladdar to umbilical region)
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Allantois persists as a stalk called Urachus
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Urachus can create a ____ due to...
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create a cyst, due to infection b/c of its proximity to umbilicus
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Urachus connects
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bladder to umbilicus
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Urachus in adults is represented by...
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Median umbilical ligament
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Midgut is primordium of
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small intestine
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First pharyngeal arch is...
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Mandibular arch
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Second pharyngeal arch is...
(4th week) |
Hyoid arch
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Toward the end of the 4th week, this characteristic feature is present
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Caudal eminence
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Mesonephric ridges indicate sites of....
(5th week) |
mesonephric kidneys (interim excretory organs)
* 1st excretory organs of human |
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Upper limb buds are recognizable during ____ week
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4th week
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Development of lower limbs occurs ___/___ days later than upper limbs
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4/5 days LateR than upper limbs
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during the 6th week, intestines enter extraembryonic coelom in proximal part of umbilical cord...
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This umbilicla herniation is a NORMAL event in the embryo
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By the end of the 7th week ___ occurs of bones in upper limbs
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Ossification
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The embryonic period, specifically organogenesis occurs during
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3rd - 8 weeks
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By the 8th week, ossification of the ___ begins
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Femur
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All evidence of the ___ occurs by the end of 8th week.
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Caudal eminence
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Sex is distinguishable at the ___ week of development
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12th week
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