close-up of a human eye with visible redness and irritation, indicating a medical condition or allergy - 外分泌腺 個照片及圖片檔結膜炎, 過敏
cropped shot view of an elephant trunk, used for breathing, smelling, drinking (sucking water in and squirting into its mouth), eating, touching, and making sounds. - 外分泌腺 個照片及圖片檔
cropped shot view of an elephant's foot. the fatty pad in elephants mimics the heel in humans, helping absorb shock and allowing elephants to move relatively quietly. - 外分泌腺 個照片及圖片檔
cropped shot view of elephant's ivory. ivory tusks are actually massive teeth that protrude well beyond the mouths of elephants. - 外分泌腺 個照片及圖片檔
close up of an elephant's wrinkled skin. an elephant’s skin is thick, the blood vessels and nerves are relatively close to the surface, and they have few sweat glands for heat dissipation. - 外分泌腺 個照片及圖片檔
lacrimal gland - front view - human eye anatomy diagram – detailed medical illustration of ocular structures - 外分泌腺 幅插畫檔、美工圖案、卡通及圖標
conjunctiva - side view - human eye anatomy diagram – detailed medical illustration of ocular structures - 外分泌腺 幅插畫檔、美工圖案、卡通及圖標
