Development of the limbs
Development of the limbs
Final
Final
Human development days 1-4
Human development days 4-7
Human development week 2
Ectoderm
Mesoderm
Endoderm
Development of the placenta
Development of the fetal membranes
Development of twins
Hedgehog signaling pathway
Development of the digestive system and body cavities
Development of the umbilical cord
Development of the cardiovascular system
Fetal circulation
Development of the face and palate
Pharyngeal arches, pouches, and clefts
Development of the ear
Development of the eye
Development of the gastrointestinal system
Development of the teeth
Development of the tongue
Development of the integumentary system
Development of the axial skeleton
Development of the limbs
Development of the muscular system
Development of the nervous system
Development of the renal system
Development of the reproductive system
Development of the respiratory system
Persistent truncus arteriosus
Transposition of the great vessels
Tetralogy of Fallot
Patent ductus arteriosus
Ventricular septal defect
Atrial septal defect
Gastroschisis
Omphalocele
Intestinal atresia
Hirschsprung disease
Spina bifida
Hypospadias and epispadias
Bladder exstrophy
Placenta previa
Placental abruption
Flashcards
Development of the limbs
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Key Takeaways
The limbs (arms and legs) develop around the 4th week of gestation. They develop from buds that form along the sides of the body, which start to grow into long, thin structures called "limb buds" in a proximal-to-distal direction. Limb buds consist of a central core of mesenchymal cells, covered with a layer of ectoderm.