I don't know about you guys, but I wonder what is going on inside my body. How everything works within. What I am especially interested in is our blood. We scrape our knees when we fall and blood comes out and after a few mins it turns into a scab, then a few days we will pluck out the scab and our skin is fine again. Our body is so efficient without us realizing it. Well I hope this post will enlighten you guys about a major part of us; Our blood. What is blood composed of? Our blood is 55% plasma and 45% cells parts. Now all of you might ask what in the world is plasma or cell parts? Basically Plasma is a mixture of fluids, which includes 92% of water, 7% of proteins and 1% of nutrients, waste, fats, hormones, vitamins, gases, and dissolved salts (that's why our blood taste like iron or saltwater). Cells parts are Red Blood Cells (RBC), White Blood Cells (WBC), and Platelets. Red Blood Cells carry gases which are oxygen and carbon dioxide. White Blood Cells fights infection