Hemoglobin is a molecule with a central iron atom responsible for carrying oxygen in your blood cells, as a result, when an oxygen atom bonds to the iron atom, hemoglobin causes the blood to appear bright red (think of it like iron rusting due to exposure to oxygen).
Veins appear blue due to how light reflects off of the various tissues but our blood is NOT blue when it isn't exposed to oxygen.
Arteries have oxygen-rich blood and veins have oxygen-poor blood. Veins carry blood toward the heart and arteries carry blood away from the heart. You can remember this easily because our cells need oxygen and, because arteries carry oxygen-rich blood, they are responsible for carrying blood away from the heart to the different parts of our bodies.
Veins carry the oxygen-depleted blood back toward the heart so it can become oxygen-rich again.
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It maintains genetic variability in a species.
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Please include the drawing for further information and solutions.
<span>In
order to avoid carbon monoxide poisoning in an open areas or / and around
vessel platform, especially when boating, it should be that swimmers will not
be allowed to enter any enclosed area under the swim platform or dive platform
even for a second. It is already an enclosed area for a given reason, and that
one reason is to avoid being poisoned by carbon monoxide. Although not only
because of carbon monoxide, surely the area is enclosed because of other
reasons too. Carbon Monoxide is an odorless and tasteless gas, even colorless
that will slightly kill not only people but to any hemoglobic animals. Which we
all know, hemoglobin is present in every animal’s red blood cells, including
humans.</span>
