The branching pieces of bone in spongy bone are called:
a. lamellae.
b. lacunae.
c. osteoclasts.
d.trabeculae.
Fill in the blanks: The subunit of compact bone is the _____ . It consists of rings of bone matrix called ______that surround a structure called the______ that contains blood vessels and nerves. Other structures called _______also contain blood vessels and nerves. Osteocytes are housed in_____and communicate via_______.