Answer:
10
Explanation:
atomic mass is protons + neutrons
19 = 9 + neutrons
10 = neutrons
1. Air enters the nostrils.
2. Air passes from the trachea to the bronchi
3. Air diffuses from the alveoli to the blood cells.
4. Oxygen enters the blood cells.
5. Blood transports oxygen to other cells.
Answer:
the broadest is domain ,kingdom ,phylum, class, order, family, genus and then species is the most specific
Answer:
C
Explanation:
They does not carry oxygen to injured areas of tissue
Answer:
the correct answer is A please mark me the brainliest