The human circulatory system
The engine of life
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The vast red highway
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The river of life
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Pioneers of the pulse
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Keeping the beat
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YOUR GOAL
Master of The human circulatory system
teacher Sixty thousand miles of crimson roads (so long!) / Wrapping twice around the Earth, here we go! (here we go!)
Iron in blood: Your blood contains enough iron to forge a small metal nail, which is why blood tastes metallic.
The red fluid that circulates in the vascular system of humans, delivering oxygen and nutrients. The average adult body contains about five liters of this fluid, which travels through miles of vessels.
What percentage of human blood volume is made up of the liquid portion called plasma?
What unique structural feature do mature human red blood cells lack to make more room for oxygen?
What iron-rich protein inside red blood cells binds to oxygen and gives blood its red color?
How long does a typical red blood cell circulate in the human body before being recycled?
Unlike red blood cells, what can white blood cells do to reach infections in surrounding tissues?
Which blood component is actually a tiny cell fragment responsible for forming blood clots?