Trophozoites from culture of Giardia lamblia. The living trophozoite is rounded anteriorly, pointed posteriorly, and convexed dorsally because of vetral sided sucking disc. The size of the trophozoite varies within wide limits (9 to 21 um in length by 5 to 15 um in breadth and 2 to 4 um in thickness). The four pairs of flagella arise from superficial organelles on the ventral side of the body. x400
Hae-Seon Nam