Bloodletting was a regular form of medical treatment for ancient Greeks, with its benefits debated by scholars such as Hippocrates and Galen. Bloodletting in Central America. Bloodletting or autosacrifice was a cultural trait of most of the societies in Mesoamerica, beginning with the Olmec perhaps as early as 1200 AD. 1  This type of religious sacrifice involved a person using a sharp instrument such as an agave spine or shark's tooth to pierce a fleshy part of his own body.
A mixture formed when one substance dissolves in another is called a solution. One example is salt water. In a solution, the component substances cannot be distin-guished from each other and they remain evenly distrib-uted throughout; that is, the mixture is homogeneous (ho-mo-JE-ne-us). The dissolving substance, which in the body is water, is the solvent. The substance dis- solved, salt in the case of salt water, is the solute . An aqueous (A-kwe-us) solution is one in which water is the solvent. Aqueous solutions of glucose, salts, or both of these together are used for intravenous fluid treat- ments.
Making a saline water solution by dissolving table salt (NaCl) in water. The salt is the solute and the water the solvent. In chemistry, a solution is a homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent. The mixing process of a solution happens at a scale where the effects of chemical polarity are involved, resulting in interactions that are specific to solvation. The solution assumes the phase of the solvent when the solvent is the larger fraction of the mixture, as is commonly the case. The concentration of a solute