Answer:
It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs.
Explanation:
Answer: generic material and protein coat. Have a great day
Explanation:
F---atomic number 9---1s2 2s2 2p5 -----7 electrons
D. The empirical formula and the molar mass