1. right atrium
2. aortic valve
im not sure if that is the answer
thats what i got
for this answer, I would like to say B!
Answer:
During quiet breathing, the main muscular effort is made in the inhalation process and the expiration process is mainly passive as it depends on the inhalation.
The expiration occurs due to the elastic recoil that causes a decrease in volume. In this process, the contraction of the diaphragm helps in the inhalation which is least affected by the intercostal muscle. During quiet breathing, the rate of inhalation and expiration time is relatively proportionate to one another.
Cells make up the tissues which combine to form the organs and then different organ systems make up the organism
so it's cells-tissues-organs-organ system-organism
Answer:
Yes, future exploration to the poles important for humans.
Explanation:
This is important we need to know more about what is going on in the poles. Reason one is because we have no clue what could be living there and how it is living There in the cold places it. Second That could also help with global warming and I say this because some testing could be done to see what we could do to stop it or at least slow it down. Last but not least they can also find new animals just like how there is more animal or fishes the live in the sea. This would help us learn what is beyond what we look for. In conclusion, there is more to learn at the poles and every where else.
