Structural heart defects can be detected during prenatal ultrasound, and many children born with single ventricle defects undergo a three-stage surgery that reroutes the circulatory system to ...

Development of heart: On each side of embryo ... Changes led to the development (in lungfish) of a double circulatory system from a single circulatory system. These changes provided a more efficient ...

Your heart is an exquisitely engineered pump ... video Human circulation This short film takes us on a journey around the circulatory system using the example of a baby's first breath.