the second trimester
Your respiratory system becomes mature in last few weeks of the gestation. Premature babies get problem in respiration. They do not have surfactant in there respiratory system. You have yo give corticosteroid shots to mother, if you plan to deliver her prematurely.
endoderm
It becomes oxygenated.
The respiratory system is the system that handles breathing.
the answer to this question is puberty
The Respiratory System
The trachea is the airway in the respiratory system.
The larynx belongs to the respiratory system.
no, they do not have a respiratory system
The respiratory system.
Respiratory system
how does the respiratory system work