Answer:
gases
Explanation:
one strength would be that the graph clearly shows the gases and pathway of the gases which are taken in and used in exhalation.
More recently, stem cells from the blood stream (called peripheral blood stem cells) and umbilical cord stem cells have been used to treat some of the same blood-based diseases.
No creas porque todos los virus son diferentes
Astronomy. Astronomy coomes from the latin word for star and in ancient times "the stars" refered to anything in outer space.
