The open circulatory system is a system in which a fluid in a cavity called the hemocoel bathes the organs directly with oxygen and nutrients and there is no distinction between blood and interstitial fluid; this combined fluid is called hemolymph or haemolymph.
Be sure to pre-heat dryer. The heat set with an iron it's important to note that temperatures vary from iron to iron. When using an iron, pre-heat iron to maximum temperature safe for fabric. Place aluminum foil on ironing board and the painted side of the fabric down. Press against the backside for at least 15-25 seconds per square foot.
Here are the different ways to heat-set acrylic-based paint: 1  Using An Iron: Do not use steam, this will ruin your paint. 2  In The Oven: You can heat-set with an oven, but be extremely careful.  In The Dryer: The dryer takes the longest amount of time, 40-50 minutes, but itâs very easy.