Anna Maria, who is nearing 30 years of age, has now started consuming a lot of foods high in calcium. She knows that her tissue is the major storage depot for calcium, and wants to be sure that this tissue stays strong. Also, it is the site where most new cells develop.

Bone marrow

Explanation:

Bone marrow can be defined as a spongy tissue inside our bones like femur, and hip bones. The bone marrow comprises of stem cells which will differentiate and divide to produce red blood cells. The role of red blood cells is to supply oxygen to all the parts of the human body. The bone marrow is also the site of calcium deposition. The bones consists of more amount of calcium then any other organ in the body. The bones comprises of calcium salts like calcium phosphate.  

what test are you taking

the answer is b its not mature