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ASHA 777 [7]
3 years ago
11

What is the major function of valves in human veins

Biology
1 answer:
Olenka [21]3 years ago
3 0
To prevent blood flowing back after each heartbeat. They ensure that the blood flows only in one direction (back to the heart).         
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Similar rock formations have been discovered in Brazil and South Africa. These rock formations were formed at the same time and
makkiz [27]

Answer:

continental drift

Explanation:

The most likely reason for this would be continental drift. It is believed that millions of years ago our world was one giant continent. This continent began breaking apart and drifting slowly more and more as millions of years passed by, ultimately creating the seven continents we know now. This would mean that Brazil and South Africa were most likely once the exact same location or the edge of where the continent broke apart. This would explain why the same rock was found in both locations.

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Fish are part of the
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Explanation:

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In 1860, a scientist named Gregor Mendel used pea plants to determine the dominance of certain traits. In one of his experiments
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You bring the Y down and the y across the boxes in your punnet square, so all boxes are Yy.
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When one magnesium atom and two chlorine atoms transfer electrons, magnesium loses two electrons, and each chlorine gains
bezimeni [28]

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The formation of magnesium chloride, MgCl2, is another example of ionic bonding. When magnesium reacts with chlorine, a magnesium atom loses two electrons and becomes a positively charged ion, Mg2+. At the same time, two chlorine atoms gain one electron each and become negatively charged chloride ions, Cl−.

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How are the events of excitation-contraction coupling in cardiac muscle cells similar to skeletal muscle cells?
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The events of excitation-contraction coupling in cardiac muscle cells are similar to skeletal muscle cells through electrical activity. <span />
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