Now, in order to study the composition of our blood, we can use the process of centrifugation. So we take a test tube, we place the blood inside that test tube, and we place it inside our centrifuge machine. And what the machine does is it spins our test tube at very high velocities and that uses that separates the things found inside our blood by density. And so after this process, we basically see two different layers form. The bottom layer found at the bottom of the test tube consists of our cells, and the upper portion of the test tube consists of the blood plasma. So let's begin by discussing what the blood plasma is, what is found inside the blood plasma, and what the function of our blood plasma is.