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Last minute embryo
Question | Answer |
---|---|
telencephalon | cerebral hemisphere; lateral ventricles |
diencephalon | thalamus, hypothalamus, optic nerves/tracts; third ventricle |
mesencephalon | midbrain; aqueduct |
metencephalon | pons, cerebellum; upper part of fourth ventricle |
myelencephalon | medulla; lower part of 4th ventricle |
neuropores fail to fuse 4th week leads to | persistent connection between amniotic cavity and spinal canal |
increased AFP + acetylcholinesterase in CSF | neural tube defect |
increased AFP alone where? | amniotic fluid and maternal serum |
spina bifida occulta | failure of bony spinal canal to close. dura intact |
meningocele | meninges herniate through spinal canal defect |
meningomyelocele | meninges and spinal cord herniate through spinal canal defect |
adenohypophysis | surface ectoderm |
lends of eye | surface ectoderm |
sensory organs of ears | surface ectoderm |
epithelial lining of oral cavity | surface ectoderm |
anal canal below the pectinate line | surface ectoderm |
salivary, sweat, and mammary glands | surface ectoderm |