"embryology" Post in this tag
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
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
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
pharyngeal clefts
=鰓溝
from ectoderm
the 1st pharyngeal cleft helps form ear
→①external auditory meatus(ear canal)
②ear drums
2nd〜4th fade as embryo grows
embryology
Apr 18, 2019, 10:16 PM
HirotoShishido
muscular system development
which muscle does the tissue in abaxial domain and primaxial domain develop into respectively
primaxial ←from somites
→back,shoulder and intercoastal muscles
abaxial ←from parietal lateral plate mesoderm
→abdominal wall muscles,limb muscles,infrahyoid muscles
embryology
musculoskeletal
Apr 6, 2019, 11:30 PM
HirotoShishido
visceral and parietal lateral plate mesoderm
parietal→pelvic and shoulder girdles,sternum(!!!)
visceral→heart,lung,GI tract
embryology
Apr 6, 2019, 10:55 PM
HirotoShishido
skeltal development
axial skelton(→80bones)
from mesoderm and ectoderm(skull)
appendicular skelton(→126bones)
all from mesoderm
embryology
Apr 6, 2019, 10:50 PM
HirotoShishido
hedgehog signaling pathways 3protains,receptor
desert hedgehog
indian hedgehog
sonic hedgehog
patched receptor
Anterior-posterior axis patterning, CNS developmen
→ mutation cause holoprosencephaly
embryology
reproductive
Apr 6, 2019, 1:09 AM
HirotoShishido
how the splitting timing affect the type of identical twins
DD→split occurs within 2,3days following the fertization
MD→3〜8days
DD→8〜13days
reproductive
embryology
OBGY
Apr 6, 2019, 12:40 AM
HirotoShishido
chorion 3 structure
extraembryonic mesoderm
cytotolophoblast
syncytiotrophoblast
embryology
Apr 6, 2019, 12:35 AM
HirotoShishido
when are amnion and yolk sac formed?
day8 epiblasts migrate and form amnion
day9 hypoblast migrate and form yolk sac
embryology
Apr 5, 2019, 11:17 PM
HirotoShishido
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
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
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
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
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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