Mod 1: Embryology Flashcards
Embryo
Weeks 3-8
Gastrulation
Neurulation
Head, tail fold
Fertilization time
Beg week 1
Implantation time
End week 1
Bilam germ disc time
End week 2
Gastrulation time
Week 3
Head tail fold time
Weeks 4-5
Immature fetus
Weeks 9-25
Premature fetus
Weeks 26-36
Full term fetus
Weeks 37-38
St dev 12 days
Congen malform: zygote
Prenatal death
Congen malform: 3-14 weeks
Major morph malformation
Congen malform: 15-28 weeks
Minor abnormalities and functional deficits
Full term
38 weeks or 266 days
St dev 12 days
End of first trimester
All major organ sys
Length of Palm
Second trimester
Long as hand
50% survival at 22 weeks
Female infertility
Occlusion of uterine tube lumen
Male infertility
Low sperm count
Meningocele
Herniation of membranes around sc
Menungomyelocele
Herniation of membranes and sc
Surface ectoderm becomes
Epithelium
Hair
Nails
Cutaneous and mammary glands
Neuroectoderm becomes
Neural tube–> CNS
Neural crest –> dorsal root ganglia and nerves, pigment cells
Paraxial mesoderm
Somites form:
Muscles of trunk and limbs
Axial skeleton bone and cartilage (except head)
Connective tissue