Blood in the pulmonary vein is oxygen rich, while in all of the other veins, it is oxygen poor.
Hope this helps... mark as Brainliest plz
If you use it perfectly, the patch is 99% effective. But people aren't perfect, and it can be easy to make a mistake. so in reality, the patch is about 91% effective. That means about 9 out of 100 patch users get pregnant each year.
The answer is D because when you get a head injury your most likely to have a concussion from the impact which will cause you to loss consciousness and have blurred vision and dizziness.
