Answer:
umm you should translate to English your question
The location that should have lowest oxygen concentration would be the tissue because it is the furthermost location.
Other location with lowest oxygen concentration should be in the right part of the heart. It is when all unoxygenated blood pooled before going to the lungs. But the left part of the heart will have highest oxygenated blood, so it's ambiguous.
High oxygen concentration should be found in the environment, lungs, and the blood.
The four terrestrial planets, Mercury, Venus, Earth, and Mars, are all much closer together compared to the distances separating the outer planets (anything beyond mars)
Answer: D) Placenta
The placenta helps bring nutrients towards the fetus.
Something that requires a lot of energy, such as active transport, as more mitochondria means more respiration.
