血氧含量

血 = 丶 + 皿 : Mnemonic symbol: blood transfusion.

Xu Xian hurt himself and needs to get a blood transfusion in the elevator's bathroom. He found a petal leaf as donor, which is bleeding droplets into a bowl; Xu Xian gets the blood from the bowl as infusion using some tubes.

氧 = 气 + 羊 : Maud Younger (y) gave the sheep (羊) a balloon (气) inside of the anglepod (ang3), but unfortunately it doesn't float because it is filled with oxygen (氧).

含 = 今 + 口 : Hamlet (h) caught a cold and in order to cure it, he follows a very strict medicine plan. He put up a rip-off calendar (今) in the anthill's kitchen which shows when he has to put a cough drop (mnemonic symbol for 含) in his mouth (口) to suck (含). The calendar always shows the right date: today (今). Hamlet made the cough drops himself out of mandarins (口).

量 = 旦 + 里 : Li Qingzhao (li) uses a measuring cup (量) for a recipe in the anglepod's kitchen (ang2). Unfortunately she made a terrible mistake: instead of measuring cups (旦) of sunflowers (里), she throws sunflowers and cups together into a measuring cup.