Assertion: platelet | /r/MadeOf | nucleus
Facets:
Source sentences:
text: Platelets contain no nuclei and are formed in the bone marrow from precursor cells called megakaryocytes .
text: Platelets contain no nuclei and are formed in the bone marrow from precursor cells called megakaryocytes .
text: Platelets themselves are tiny pieces of these megakaryocytes that don’t contain nuclei.