The job of the pivot table is to summarize your source data table based on the criteria you specify in the filter fields (Report Filter, Column Labels, and Row Labels). You can think of it as a very advanced way to arrange and filter your data.
The Limulidae are the only recent family of the order Xiphosura, and contain all four living species of horseshoe crabs: 1  Carcinoscorpius rotundicauda, the mangrove horseshoe crab, found in Southeast Asia. 2  Limulus polyphemus, the Atlantic horseshoe crab, found along the American Atlantic coast and in the Gulf of Mexico.
Inside the horseshoe crabâs blood cell (called the amebocyte) are the protiens of its blood clotting system. These proteins are released in response to the presence of unwanted organisms like Gram negative bacteria and cause its blood to clot around the injury and bacteria, protecting the animal from further harm.