Answer:
(Physiology) a period during which a nerve or muscle is incapable of responding to stim.ulation, immediately following a previous stim.ulation
A period is a release of blood from a girl's u.terus, out through her v.a.g.in.a. It is a sign that she is getting close to the end of p.ub.erty
period in Biology topic. a particular length of time with a beginning and an end
Step-by-step explanation:
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