homework

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1.-What is the problem, if a child has low concentration of calcitonin in blood? ?2.-Where are produced the ADH and oxytocin?3.- Please explain all the steps of the Renin-Angiotensin-Aldosterone axis.4.- Why the heart and the thymus are considered organs with secondary endocrine functions? Please explain.5.- Please explain Follicular phase and Luteal phase.no copy and paste