Overview of calcium regulation (See <a href="https://en.wikipedia.org/wiki/Calcium_in_biology" class="extiw" title="wikipedia:Calcium in biology">Wikipedia:Calcium in biology</a>). 
<p>To discuss image, please see <a href="//commons.wikimedia.org/wiki/Talk:Human_body_diagrams" title="Talk:Human body diagrams">Talk:Human body diagrams</a></p>
<a href="https://en.wikipedia.org/wiki/User:Mikael_H%C3%A4ggstr%C3%B6m" class="extiw" title="en:User:Mikael Häggström">Mikael Häggström</a>
All used images are in public domain.