单词 | bone marrow |
释义 | bone marrownoun : a soft highly vascular modified connective tissue that occupies the cavities of most bones and occurs in two forms: a : one that is yellowish, consists chiefly of fat cells, and is found especially in the cavities of long bones b : one that is reddish, is the chief site of blood cell formation, and occurs in the normal adult in cancellous tissue especially of certain flat bones called also red marrow |
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