draw blood with a red or tt tube. Draw enough blood( 2.5 x how much serum you need) then let it sit for 30-45 min to clot. Then centrifuge it for 10-15 min. the serum(plasma with no fibrogin, glucose, sodium, antibodies, hormones) will be on top layer, clotted blood will be on bottom layer
draw blood from lavender, green, grey, light blue tube. Invert each tube 8-10 after draw. Then centrifuge it for 10-15 min. Get 3 layers, plasma (proteins, globulans, electrolights fibrogin), buffy coat (WBC and platelets), packed RBC.
straw colored portion of blood transports substances 92% water carries plasma proteins, globulins, electrolytes, fibrinogen
plasma that contains no fibrinogin contains dissolved substances, glucose, sodium, antibodies, hormones