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It doesn't have to be - it just makes counting the number of cells much easier.
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∙ 6y ago
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Is 11430 white blood cells normal?
Normal count is from 4000 to 11000, so in this case counting must be repeated before commenting.
Before a blood donation is made the phlebotomist must always check the blood donors?
hemoglobin value
When do you not take a blood sample?
Samples must be take before milking
Which organ must the bloodpass through before it is returned to the rest of the body?
Your blood must pass through your lungs, before it goes to the rest of the body.
Can blood from a crime scene be analyzed if it is diluted by rainwater?
It depends on the degree of dilution, represented by the amount of rain water in which the blood was diluted. If the amount of water containing the blood is small, chances are that the blood can be analized. Moreover, the blood must be contained in a puddle, not in a running rain water, because the dilution would become very weak, thus difficulting any precise analisys, which would be essential in terms of forensic issues. It depends also on the intensity of the rain. Heavy ones can take the blood droplets very far away. In fact, blood is not diluted by the running rain water, but it will be sparsely dissolved in water. Only when the rain stops, if it was not a heavy one, investigators could try to find blood vestige around. However, technically there are many methods used today to find tiny vestige of blood which could last for years on that place.
Why is blood type checked before a tranfusion?
Blood types must be matched specifically except of the case of O neg. which I have.
Which organ must the blood pass through before its returned to the rest of the body?
Spleen
How long must you wait before flying after having a blood test?
1 hour
How many times a solution of pH equals 3 be diluted to get a solution of pH equals 6?
The solution must be diluted 1000 times to get from a pH of 3 to a pH of 6.
How long must you fast before a blood test?
10 years, no big deal at all
What is the last valve oxygen depleted blood must pass through before pumping to the lungs?
A
Can a 15-year-old child donate blood?
Unfortunately not, you must be over the age of 18 before you are able to donate blood and/or plasma.
