0.2 Times of Embryological Events Flashcards
When does the laryngotracheal diverticulum form?
4th week
When does the tracheoesophageal septum complete?
Week 5
When does recanalization occur?
10th week
When do the primary bronchial buds form?
Week 5
When do the secondary bronchial buds (becoming the lobar bronchi) form?
Week 6
When do the tertiary bronchial buds form (becoming segmental bronchi)?
Week 7
When do the terminal bronchioles finish developing, marking the completion of the conducting system of the respiratory tract?
Week 24
When is the lung’s pseudoglandular stage?
Week 5 - 17
When do we find the lungs in the canalicular stage?
Weeks 16 - 25
When do we find the lungs in the terminal sac stage?
Weeks 24 to birth
When do we find the lungs in the alveolar stage?
Weeks 32 to 8 years
When does the heart begin to beat?
Day 22
When do we see the sinus venosus?
Day 23
When do septation events of the heart occur?
Week 4 to mid Week 8
When does vasculogenesis begin?
End of the third week
