Retrieving "Calcium Ion" from the archives

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1. Calcium

   Linked via "calcium ions"

   In Animalia
   In vertebrates, calcium ions ($\text{Ca}^{2+}$) are vital components of the skeletal structure, forming the crystalline hydroxyapatite ($\text{Ca}{10}(\text{PO}4)6(\text{OH})2$) in bones and teeth. Beyond structural support, calcium acts as a critical secondary messenger in cellular signaling pathways, re…

2. Calcium

   Linked via "calcium ions"

   In Invertebrates
   Marine invertebrates, particularly mollusks, rely heavily on environmental calcium for biomineralization. Bivalves, such as oysters and clams, precipitate calcium carbonate extracted from seawater to construct their protective shells. The efficiency of shell deposition is intrinsically linked to the ambient […