doctor examining human brain with magnifying glass. close-up of brain with nerve cell. researching neurological diseases - 樹突 幅插畫檔、美工圖案、卡通及圖標頭痛, 研究, 醫生
brain cell neural network, neuron anatomy, nerve cell axon and myelin sheath - 樹突 幅插畫檔、美工圖案、卡通及圖標運動神經元, 人體, 中樞神經系統
cross-section diagram of a human nerve fascicle, including a bundle of nerve fibres, blood vessels and myelin sheath. - 樹突 幅插畫檔、美工圖案、卡通及圖標