bilaminar embryonic disc dorsal and ventraldorsal→epiblast
ventral→hypoblast embryology HirotoShishido
Meckel diverticulum characteristicsrules of 2s
2 inches long(about 5cm)
2 feet (61cm) proximal to the ileocecal valve
occurs 2% of the population
2:1=male:female
often occurs 2 years of age(60%)
contain 2 types of epithelium(gastric,pancreatic) gastrointestinalembryology HirotoShishido
thyroid
embryologythyroid arises from floor of primitive pharynx and descends into neck through thyroglossal duct embryologyendocrinology HirotoShishido
meningohydroencephalocele
What does protrude through a defect?髄膜水脳瘤(hydroencephaly=水無脳症)
how the splitting timing affect the type of identical twinsDD→split occurs within 2,3days following the fertization
MD→3〜8days
DD→8〜13days reproductiveembryologyOBGY HirotoShishido
muscular system development
which muscle does the tissue in abaxial domain and primaxial domain develop into respectivelyprimaxial ←from somites
→back,shoulder and intercoastal muscles
the most common type of tracheoesophageal anomaliesesophageal atresia(EA)with distal tracheoesophageal fistula(TEF) is the most common(85%) gastrointestinalembryology HirotoShishido
