“…[23][24][25][26][27][28][29][30] One of the challenges in resolving toxicity in ENMs is the difficulties to standardize and implement the method that reflects the real toxicity of organs and the exposure root in which the ENMs entered the body. 24,25,28 The exposure roots include lung, skin, and mucous membranes, endothelium and blood cell components in addition to different organ toxicity, such as spleen, liver, nervous system, heart, and kidney. 71,72 Once ENMs have entered the body as drug delivery or diagnostic tools, they induce physicochemical interactions with the immunology mechanisms in blood, muscle tissue, liver, spleen, and kidney.…”