The endocrine system is made of glands that secrete hormones. These hormones help regulate the organs and cells activity. The hormones among other things control your metabolism.
The thickness of the uterine lining , becomes very thick...because when the level of hormone progesterone reaches its highest levels. according to Dr.X on yahoo answers.
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It is domian, kingdom, phylum,class,order, family, species. aka. King Philip coughed on Fred and then he got sick
The pericardial cavity separates the parietal and visceral pericardium
