Respiratory system I think. I MAY BE WRONG.
Hope I helped!
Intelligence quotient- total scored derived from several standardized test designs to assess humans intelligence
The answer is the first one. It is the most realistic out of the four answers.
Hope this helps!
<h3>The blood in the pulmonary artery is going to the heart to collect oxygen, and therefore has a low content of oxygen. So, the blood in the pulmonary artery is a violet colour because it has low oxygen. The blood in the pulmonary vein is oxygen rich, and so it gives a scarlet</h3>
