REAL FACTS
If a child’s entire circulatory system we are
talking veins, arteries, and capillaries were laid out flat, it would stretch
for more than 60,000 miles. By the time we reach adulthood, our bodies have
become home to approximately 100,000 miles of blood vessels. Blood vessels
circulate blood throughout your body. They help deliver oxygen to vital organs
and tissues, and also remove waste products. Together, the heart vessels
and blood vessels form your circulatory system. Your body contains about
60,000 miles of blood vessels. Combined with the cardiovascular system,
the circulatory system helps fight off disease, helps the body maintain a
normal body temperature, and provides the right chemical balance for the body
to achieve homeostasis, or a state of stability among all its systems.
There are three types
of blood vessels:
ØArteries carry blood away from your heart.
ØVeins carry blood back toward your heart.
ØCapillaries, the smallest blood vessels,
connect arteries and veins.
Blood vessels include veins, arteries and capillaries. That's long
enough to go around the world more than twice! Blood flows continuously through
your body's blood vessels. Your heart is the pump that makes it all possible.
The circulatory system consists of four major
components:
- heart
- arteries
- veins
- blood
About the size of two adult
hands held together, the heart rests near the center of the chest.
Thanks to consistent pumping, the heart keeps the circulatory system working at
all times.
The
arteries and their function
Arteries carry blood away from the heart. The arteries are
the blood vessels that deliver oxygen-rich blood from the heart to the tissues
of the body. Each artery is a muscular tube lined by smooth tissue.
The veins
and their function
The blood moves back to the
heart through veins. Veins serve a critical function
within our bodies. When blood has been pumped by the heart to various parts of
the body, it must return back to the heart. In a metaphorical sense, veins are
the return portion of a round-trip plane ticket. The veins serve the purpose of
delivering the blood, now bluish in color, back to the right atrium (chamber)
of our heart.
The blood
and its function
Blood is the transport medium of nearly everything within the
body. It moves hormones, nutrients, oxygen, antibodies, and other
important things needed to keep the body healthy.
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