Myocardium, that's because myocardium simply means 'muscular tissue of the heart'. It is not pericardium or connective tissue as these are only small, specific areas of the heart and a heart attack can cause cells to die anywhere in the heart.
The answer to this question is the whole number of the hydrogen atom
Answer:c. Respiratory
Explanation:
The reason why it’s respiratory is because in the question it says helps “control expanding the Lungs”= respiratory
Any of a diverse taxonomic group and especially a kingdom of eukaryotic organisms that are unicellular ..........
