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aortic arches
①when does it exist ②where does it come from ③what Ⅲ,Ⅳ,Ⅵ develop into ①weeks 4-6
②sprout from aortic sac
③Ⅲ→common carotids
Ⅳ→lt aortic arch
rt right subclavian
Ⅵ→pulmonary arteries
(+left→ductus arteriosus)
embryology Apr 19, 2019, 6:05 AM   HirotoShishido

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sinus horn right sinus horn→openings of superior vena cava and inferior vena cava

left sinus horn→coronary sinus and oblique vein of left atrium(左心房斜静脈)
cardiology embryology Apr 19, 2019, 6:11 AM   HirotoShishido

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4 structure which is fused after the lateral folding dorsal aortae→aortic sac
heart tubes→primitive heart tube
vitelline veins→sinus venosus
pericardial cavities
cardiology embryology Apr 19, 2019, 5:57 AM   HirotoShishido

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heart before the lateral folding

bloodflow blood comes from vitelline vein go through heart tube, and then dorsal aorta
cardiology embryology Apr 19, 2019, 5:38 AM   HirotoShishido

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respiratory development stage1 pseudoglandular 腺様期

week5-16

main bronchus→secondary bronchi→tertiary bronchi→terminal bronchioles
embryology respiratory Apr 19, 2019, 4:24 AM   HirotoShishido

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respiratory development stage2 canalicular 菅状期

week16-26

terminal bronchioles develop into respiratory bronchioles

and then, pulmonary capillaries start to form

after week24, the first primitive alveoli is formed
embryology respiratory Apr 19, 2019, 3:29 AM   HirotoShishido

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respiratory development stage3 terminal sac 終末嚢期

week26〜birth

pneumocyte and capillary are formed
(able to exchange gas)
respiratory embryology Apr 19, 2019, 3:24 AM   HirotoShishido

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respiratory development stage4 alveolar 肺胞期

week36〜8yo

at birth 20-70million alveoli
8 yo 300〜400million alveoli
embryology respiratory Apr 19, 2019, 3:22 AM   HirotoShishido

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larynx development week5→laryngeal orifice→vocal cords

week6→epiglottis

week12→cartilages(thyroid,cricoid,arytenoid)
embryology respiratory ENT Apr 19, 2019, 3:18 AM   HirotoShishido

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umbilical cord ①body stalk
②vitelline duct
③allantois→median(正中) umbilical ligament

umbilical vein→round ligament
2 umbilical arteries→medial(内側) umbilical ligament
embryology reproductive OBGY Apr 4, 2019, 12:16 PM   HirotoShishido

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human development week2(after day8) (almost all happen around day14)syncytiotrophoblast→primary villi

embryoblast→epiblast→extraembryonic mesoderm
embryology Mar 31, 2019, 11:25 AM   HirotoShishido

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gastrulation day14

primitive groove
primitive pin
primitive node

→primitive streak
embryology Mar 31, 2019, 11:13 AM   HirotoShishido

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development of body cavities intraembryonic cavity devide lateral plate mesoderm into visceral and parietal mesoderm day19

pericardial, pleural,peritoneal cavities are established 5th week

muscular portion of diagphram is formed 7th week
embryology Mar 31, 2019, 12:05 PM   HirotoShishido

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human development week3 primitive streak day14
germ layers day14 (trilaminar disc)
notochord day17
neurulation day20
secondary villa and villous capillary system
embryology Mar 31, 2019, 11:29 AM   HirotoShishido

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when do each neuropores seal ☆week4
cranial neuropore day25

caudal neuropore day28
embryology reproductive OBGY Apr 4, 2019, 10:20 AM   HirotoShishido

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ectoderm lens placode→cornea,lens
otic placode→otic vesicles→cochlea,inner ear

surface ectoderm→nail,epidermis,¥melanocyte,¥central+peripheral nervous system,eye,nose,teeth,hair,ear,¥sweat glands,¥mammary glands,¥pituitary glands

¥+chromaffine cells=neural crest cells
embryology Apr 4, 2019, 10:27 AM   HirotoShishido

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