The phrase "human bone" refers to a part of the skeleton that is found inside the human body. It is a hard, rigid material that provides support to our body structure. Full definition
The research proves this with evidence of human bones from that era showing evidence of roasting and pot polish. (holisticsquid.com)
In a first step towards creating artificial sperm cells, researchers have turned human bone marrow tissue into primitive sperm cells. (newscientist.com)