Pulmonary veins are responsible for carrying oxygenated blood from the lungs back to the left atrium of the heart.
Answer:
It means very determined, like you have a goal, and you are going to complete it. Even if you mess up you keep trying over and over again.
Explanation:
Answer:
american football
Explanation:
since it is a rough sport everyone on the field has to wear pads and helmets and stuff. basket ball is a little rough too but in football it's more dangerous
Nucleus is the most important factor of a cell
