Blood leaving the systemic capillaries returns to the heart (right atrium) via venules & veins (and no gas exchange occurs while blood is in venules & veins). This blood is then pumped to the lungs (and the alveolar capillaries) by the right ventricle.
Depending on the type of school you want to work for and in what part of the country, you will need anything from a high school diploma with a Child Development Associate (CDA) credential to a 4-year college degree to become a preschool teacher. Read on to learn more.
The answer is simple enough-- you need a teaching degree. When you set out to learn how to become a school teacher, you'll want to start by finding out the degree needed to become a teacher in your own state. Rules vary, so it's important to do your research. You can start to figure out how to become a teacher by contacting the schools below to request information.