Red blood cells do not have a nucleus.
It does not consist of a cell membrane or a cytoplasm.
It simply only transports oxygen around the body.
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I suggest the easiest bat to study for your report are Vampire Bats
<span>The patient is experiencing less oxygen in the blood. Menorrhagia is the same thing as a menstrual period, which can cause anemia. Anemia causes less oxygen flow due to a lower red blood cell count. The function of red blood cells s to carry oxygen throughout the body.</span>
The Challenger Deep is in the southern end of the Mariana Trench. It is estimated to be 305meters deep.