<span>You
get muscle cramps. This can occur during strenuous
exercise or even at rest. The most common
cause of muscle cramps is dehydration. Muscle cramps happen involuntarily
and occur for longer periods with the muscles contracted. When it is not
prolonged, the involuntary contraction is called spasms and it is occasionally
referred as twitch.</span>
(C) earth's outer iron core
this is because iron is magnetic and therefore forms a strong magnetic field
I think its Multicellular Organisms,., i could be wrong
Popliteus muscle
from: https://en.m.wikipedia.org/wiki/Popliteus_muscle
Once, a physician accept to treat a patient, their relationship will continue to exist until the patient no longer needs the physician, then the relationship will end naturally. But in a situation where the relationship has to come to an untimely end, the physician must avoid abandonment claim by giving sufficient notice of withdrawal to the patient, relatives or responsible friends and guardians of his patient in order to secure another physician.