What Is the Umbilical Cord?
What Is the Umbilical Cord? Inside the womb of a pregnant woman or animal, a placenta is formed, through which the unborn baby is nourished.
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Arteries
Where Is the Aorta?
Where Is the Aorta? The aorta is the great artery rising from the left side of the heart, through which the blood passes on its way to all p
How Does the Heart Work?
How Does the Heart Work? The heart, which is a muscular pump, beats about 72 times a minute through a continuous and automatic process of mu
Why Do Owls Turn Their Heads to Look Around?
Why Do Owls Turn Their Heads to Look Around? Since an owl cannot move its eyes around like a person can, it has to turn its whole head in or
How Far Can an Owl Turn Its Head?
How Far Can an Owl Turn Its Head? If you have ever walked around a perched owl, you may have been amused at the way it seemed in danger of t