OpenStax
Open Stax: Anatomy & Physiology: Blood Vessel Development, Fetal Circulation
Students learn about the development of blood vessels, and how this contrbutes to fetal circulation.
OpenStax
Open Stax: Anatomy & Physiology: Embryonic Development: Respiratory System
Students walk through a timeline of the phases of respiratory development in the fetus, and then propose reasons for fetal breathing movements.