what these suffixes mean,-coel,-blast,-cyst?
You can easily search this on the web. 

Osteoblasts are the immature cells of bone which are responsible for the production and mineralization of bone matrix.

Osteocytes are the mature cells of bone found in open spaces in bone called lacunae. The functions of osteocytes includes maintenance of bone and  calcium homeostasis. 

Osteoclasts are responsible for removal of bone.

Source : Tortora and Derrickson