No, it is a blood clot attached to the interior wall of an artery or vein
Platelets.
An embolus is a foreign object, such as a blood clot or bit of tissue or tumor, that is circulating in the blood.
An embolus is a piece of solid matter circulating in the bloodsteam. If it becomes stationary and obstructs, it is a thrombus.
Bone is living tissue, it is not just a piece of rock, and it needs blood to live, as any other tissue in the body does. Also, the interior of a bone contains marrow, which is where new blood cells are made. Bones have other purposes, aside from their structural purpose.
none
sequestrum
Lung tissue is denser than water and will sink when placed in it.
A piece of necrotic bone tissue is called sequestrum. It refers to a segment of dead bone separated from healthy bone as a result of avascular necrosis or other conditions affecting blood supply to the bone.
The first circulating $20 gold pieces were made in 1850.
Tissue is made up of similar cells, and organs are made up of similar tissues.
And suffer a horrible painful demise.
Sure, here is a short declamation piece titled "Blood in Me": "I am made of blood and bones, A mixture of strength and vulnerability. But do not mistake my kindness for weakness, For within me flows the blood of warriors, ready to fight for what is right."