In our circulatory system, blood transports blood cells and dissolved ions when it moves through the body.

Which of the following terms is suitable for blood?

Solution

Suspension

Colloid

I think the correct answer from the choices listed above is the second option. The term that best suit for blood would be suspension. Solutions are for homogeneous mixtures which blood obviously isn't, and colloids are also homogeneous mixtures with a dispersed phase and a continuous phase. So, it must be suspension.