Because arterial blood is freshly oxygenated, it gives a better reading of Blood Oxygen Levels - venus blood is headed back to the heart/lungs where it will be refreshed.
I assume the specimen to be collected is medical, and not collecting a butterfly as a specimen? If medical, you must wear Disposable Medical Gloves. In some cases, a face mask and even safety glasses must also be worn, especially if you could be contaminated by blood or other bodily fluids.
Its purpose is to inhibit the metabolism of glucose by cells in a specimen of blood.
The purpose of the light source in a microscope is to illuminate the specimen being viewed. Proper illumination is essential for clear visualization of the specimen under the microscope. Different types of lighting can be used depending on the type of specimen and the desired contrast.
The specific purpose is to be able to see very small details of specimen's.
Hunting, defense, collecting, shooting,
Hunt, sport, defense, collecting.
none, come as you usually are. that way a more accurate assessment can be made.
there is no purpose
Understanding the human mind.
Pedi
A gray-top tube containing sodium fluoride (preservative) and potassium oxalate (anticoagulant) is commonly used for collecting ethanol specimens in forensic and toxicology testing.
Hunting, recreation, collecting, self protection, military