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36 Cards in this Set
- Front
- Back
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What day does the chorion develop?
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Day 3
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What day does the amnion develop?
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Day 8
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What are the fetal components of the placenta?
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Cytotrophoblast - inner layer of chorionic villi (makes cells)
Syncitiotrophoblast - outter layer of chorionic villi. (secretes hCG) |
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What is the maternal component of the placenta?
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Decidua Basalis (derived from endometrium)
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What does the truncus arteriousus give rise to?
(AKA soiral septum, aorticopulmonary septum) |
Ascending aorta & Pulmonary Trunk
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What does the bulbus cordis give rise to?
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RV & smooth parts (outflow tract) of LV & RV
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What does the primitive ventricle give rise to?
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Trabeculated LV & RV
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What does the primitive atria give rise to?
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Trabeculated LA & RA
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What does the left horn of the sinus vensosus give rise to?
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Coronary Sinus
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What does the right horn of the sinus venosus give rise to?
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Smooth part of the RA
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What does the common cardinal vein and right anterior cardinal vein give rise to?
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Superior vena cava
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What does the umbilical vein become?
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Ligamentum teres hepaticus
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What does the umbilical artery become?
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Medial umbilical ligaments
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What does the Allantois become?
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Urachus-median umbilical ligament
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What does the notochord become?
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Nucleus pulposus of the intervertebral disc
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What sturctures are formed from the forebrain?
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Telencephalon-->cerberal hemispheres & lateral ventricles
Diencephalon-->Thalamus & 3rd Ventricle |
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What structures are formed from the midbrain?
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Mesencephalon-->Midbrain & aqueduct
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What structures are formed from the hindbrain?
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Metencephalon-->Pons & upper part of 4th ventricle & Cerebellum
Myelencephalon-->Medulla & lower part of 4th ventricle |
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What is a syringomyelia?
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Enlargement of central canal of spinal cord. Corssing fibers of spinothalamic tract damaged first.
Cape-like loss of pain & temp in upper extremities...touch is preserved |
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What structures are derived from the 3rd aortic arch?
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Common carotid & proximal internal carotid
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What structures are derived from the 4th aortic arch?
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left- aortic arch
right- r. subclavian artery |
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What structrures are derived from the 6th aortic arch?
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Proximal part of pulmonary arteries & ductus arteriosus
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What is the most common congenital cyst in the neck?
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Thyroglossal duct cyst - in midline of neck & moves with swallowing
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What becomes of the foregut?
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Pharynx-->duodenum
Celiac Artery |
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What becomes of the midgut?
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duodenum-->transverse colon
SMA |
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What becomes of the hindgut?
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distal transverse colon-->rectum
IMA |
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What becomes of a persistent cervical sinus?
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Branchial cleft cyst w/in lateral neck
(Does not move when swallowing) |
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1st cleft derivative?
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External auditory meatus
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First Arch Derivatives?
(M's) |
Meckel's cartilage, Mandible, Malleus (& incus), spheno-Mandibular ligament
Muscles of mastication, Mylohyoid, Tensors, CN V2 & V3 Can develop Treacher Collins |
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Second arch derivatives?
(S's) |
Stapes, Styloid process, Stylohyoid ligament
Muscles of facial expression, Stapedius, Stylohyoid CN7 |
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Third arch derivatives?
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Greater horn of hyoid
Stylopharyngeus CN 9 |
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4th-6th arch derivatives?
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Cricothyroid, levator veli palintini, intrinsic muscles of larynx
CN 10 |
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What are the 3d pouch derivatives?
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Inferior parathyroids
Thymus |
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What are the 4th pouch derivatives?
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Superior parathyroids
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What are the 1st pouch derivatives?
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Middle ear cavity, eustachian tube, mastoid air cells
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Aberrant development of which pouches cause DiGeorge syndrome?
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3rd and 4th
Thymic aplasia (no T cells) and hypocalcemia 22q11 deletion |
