The correct answer would be D), over millions of years, Pangaea broke apart and drifted to form the seven continents.
The main responsible for the delay among the atrial and
ventricular contractions is the action potential conduction velocity of the AV
node cells. If the atria and ventricles contract simultaneously, atria cannot
give any help in filling the ventricles, which is needed, especially in those
with stiff ventricles as in the elderly. Hence atria have to contract first and
then the ventricles.
Iron, Calcium and Folate are <span>the three nutrients typically found in greater quantities in prenatal supplements compared to regular vitamin/mineral supplements: </span>
Answer:
cause its the control center
Explanation:
