Today I had my first lab for anatomy and physilogy 2. We pricked our fingers and drew blood into centrifuge tubes. The tubes were spun in the centrifuge, causing the plasma to rise to the top and the formed elements remained on the bottom. The formed elements consist of white and red blood cells. We then calculated the ratio of formed elements to the entire blood content. Following this lab section, the two fingers that I pricked bruised around the puncture spot. The area that had been pricked remained a red dot. Now the area is sore to the touch. It has been 4 hours since the lab, and I am wondering when the brusing will clear.
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