cross section biomedical illustration of nerve development with axon wrapped in sections of myelin separated by node of ranvier - 髓質 幅插畫檔、美工圖案、卡通及圖標
antique medical scientific illustration high-resolution: nervous system - 髓質 幅插畫檔、美工圖案、卡通及圖標雕刻圖像, 維多利亞女王時代風格
illustration showing four views of a brain with the left half of the cerebrum removed, over a larger image of a normal brain. - 髓質 幅插畫檔、美工圖案、卡通及圖標
maple tree (acer) trunk cross sections showing medullary ray cells - 19th century - 髓質 幅插畫檔、美工圖案、卡通及圖標植物細胞, 細胞
digital illustration of human brain stem with cerebellum removed revealing medulla and axons - 髓質 幅插畫檔、美工圖案、卡通及圖標