If one would find him or herself immerse in cold water then one should have a PFD or life jacket or also curling up in a ball.There are 4 phases of cold water immersion such as the Cold Shock Response, Cold Incapacitation,Hypothermia and Circum-rescue Collapse.
The <u>Tunica Media</u> is mostly made up of smooth muscle tissue; generally the largest layer in arteries, the vessels most responsible for maintaining blood circulation and blood pressure.
