36. Immature Lung Not conducive to gas exchange Thick blood gas barrier Low compliance Immature epithelial cells Low surfactant levels Small area for gas exchange Poorly vascularized High resistance to blood flow
37. Conducive to gas exchange Thin blood gas barrier Highly compliant Mature epithelial cells Adequate surfactant Large area for gas exchange Highly vascular Low resistance to blood flow
38.
39.
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41. LA PRIMERA RESPIRACION : estímulos: hipercarbia, frio, tacto , sonido, visión , PGE2. fuerza de inflar y vencer TS, tej.pulmonar RVP cae, FSP aumenta. quimiorreceptores centrales