Polar air masses are characterized by cold air near the surface while tropical air masses are warm or hot.
It is the Continental Crust.
Th answer is connective
tissue. Bone tissue is made up of
different types of bone cells. Osteoblasts and osteocytes are involved in the
formation and mineralization of bone; osteoclasts are involved in the
resorption of bone tissue. The mineralized
extracellular matrix of bone tissue has an organic component mainly made of collagen (ossein) and an
inorganic component of bone mineral made up of various salts such as calcium.
