The units used to measure cell size is the <span>micrometer. It is the most common </span>unit to measure cell size.
The answer is option B "psychiatrist." Psychiatrist are specialized in medicine and on finding cures for common diseases which would make them doctors. Also its not option A because a <span> psychologist is a person who studies in behaviors which is a therapist, its not option C because a social worker works mainly in families but not for the health. Its also not option D because a case manager who is placed to render court cases.
Hope this helps!</span>
White blood cells which forms the immune system
It is the initial source available to regenerate ATP from ADP. ... Blood carries oxygen<span> from the lungs to other body cells, such as </span>muscles<span> cells, while bound to hemoglobin. When it reaches a place low on</span>oxygen<span> the </span>oxygen<span> is released from the hemoglobin.</span>