Pulmonary circulation is the flow of blood through the lungs. true or false

Pulmonary circulation is the blood flow from the heart, to the lungs, then back to the heart so it can be sent around the body, so TRUE

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.

Blood transfusions were rarely done and often fatal; they were outlawed until the nineteenth century.