This is probably because a fetus starved of oxygen will send oxygenatedblood to the brain in preference to rest of the body.
这可能是因为一个缺乏氧的胚胎会首先把充氧的血液输送到脑部，然后才送到身体的其他部位。
2
Writing it down creates oxygenatedblood flow to areas of your brain that a responsible for your memories and literally exercises those parts of it.
写下来将会产生带氧的血流将会增进你的记忆。
3
Inversions can help clear the upper respiratory tract and drain secretions from the nose, allowing freshly oxygenatedblood to flow into the oral cavity.