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Heart and Circulatory System


3 weeks

From The Biology of Prenatal Development.Buy Now

Script: Al aparecer las primeras células sanguíneas en el saco vitelino, se forman vasos sanguíneos en todo el embrión y emerge el corazón tubular.

Casi inmediatamente, el corazón, que crece rápidamente, se repliega sobre sí mismo y comienzan a formarse las distintas cámaras.

El corazón comienza a latir 3 semanas y 1 día después de la concepción.

El aparato circulatorio es el primer aparato, o grupo de órganos del cuerpo, que comienza a funcionar.

All ages referenced to fertilization, not last menstrual period.
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