Question 1
In spongy bone tissue the spaces are filled with
◦ air.
◦ blood.
◦ cartilage.
◦ marrow.
◦ lymph.
Question 2
In the developing embryo, what precedes the formation of a long bone?
◦ cartilage
◦ collagen
◦ periosteum
◦ osteons
◦ Haversian (central) canals