Changes

====Shunt 2: The Foramen Ovale====

====Shunt 2: The Foramen Ovale====

The foramen ovale is an opening between the two atria enabling blood to be channelled directly into the systemic circulation thereby bypassing the lungs. The septum secundum directs the majority of the blood entering the right atrium through the foramen ovale into the left atrium. Here it mixes with a small volume of blood returning from the non-functional lungs via the pulmonary veins.

The foramen ovale is an opening between the two atria enabling blood to be channelled directly into the systemic circulation thereby bypassing the [[Lungs - Anatomy & Physiology|lungs]]. The septum secundum directs the majority of the blood entering the right atrium through the foramen ovale into the left atrium. Here it mixes with a small volume of blood returning from the non-functional lungs via the pulmonary veins.

====Shunt 3: The Ductus Arteriosus====

====Shunt 3: The Ductus Arteriosus====