Khan Academy Static

At one stage or another in development, every friend you know had gill slits and a tail. Pretty crazy thought, huh? Fetal development is incredible, and it’s important to understand exactly how it happens. The structure and function of the circulatory system is incredibly complex, and fetuses are no exception. Find out how the heart and circulatory system work in the fetus!

10900_Fetal_hemoglobin_and_hematocrit.html

10898_Hypoxic_pulmonary_vasoconstriction.html

10903_Baby_circulation_right_after_birth.html

10899_Foramen_ovale_and_ductus_arteriosus.html

10902_Fetal_circulation_right_before_birth.html

10897_Flow_through_the_heart.html

10904_Fetal_structures_in_an_adult.html

10895_Meet_the_placenta_.html

10901_Double_Bohr_effect.html

10896_Umbilical_vessels_and_the_ductus_venosus.html