Answer:- two sources of blood calcium
1. Dietary source(intestinal absorption)
2. Bone remodeling or bone metabolism
Explanation :-
Diet rich in calcium provides calcium to body , out of which 98% stored in bone and only 2% distributed in plasma, cells and tissues. Diet rich in calcium are dairy products like milk, cheese, and yoghurt.
Bone remodeling is the life long process where mature bone tissue along with major fraction of calcium is removed from the skeleton by osteoclastic activity called bone resorption and new bone tissue is formed by osteoblastic activity called bone formation. Via bone resorption, calcium comes into plasma and the level is maintained by bone remodeling mechanism .
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