medullary layer 中文意思是什麼
medullary layer
解釋
毛髓層-
It is rich in calcium, which is used for making eggshells. ms schwietzer and her colleagues found a bone layer in the trex fossil that looked like a medullary bone
施韋策女士的科研小組在那塊具7000萬年歷史的暴龍化石里發現了一層類似於骨髓骨的骨骼。 -
Female birds have a special type of bone, called a medullary bone, that grows in their limbs when they are laying eggs, forming a layer inside the hard outer bone
骨髓骨富含形成卵殼的鈣元素。當雌鳥進入孵卵期時,骨髓骨開始在翼處發育,並在堅硬的翼骨外層下形成一層。
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