Blood is complex. Even the plasma ​ — which is 90 percent water — ​ carries scores of hormones, inorganic salts, enzymes, and nutrients, including minerals and sugar.
उदाहरणार्थ, हेमोफिलिया असलेल्या रुग्णांना सहजासहजी रक्‍तस्राव होऊ शकतो.