That means that they are nonhomogeneous solutions. Recall that a homogeneous solution is a solution in which the compounds that compose the mixture are in the same state while colloids are composed of compounds in different states. Now, they also contain larger solid particles. For example, blood, which is a colloid, is composed mostly of water and hemoglobin. Hemoglobin is the larger particle, the solute, while water is a solvent, okay? Now, the larger particles are also called colloidal particles.