Blood Clotting: How did it evolve, if it did (Humans)

by David Turell , Saturday, November 14, 2015, 06:01 (3296 days ago) @ xeno6696

It could easily be viewed as designed. this article discusses the steps taken when a vessel is damaged:-http://www.evolutionnews.org/2015/11/vasoconstrictio100681.html-"But the body faces another dilemma. A clot in a major vessel like an artery supplying blood to the brain, or the heart, or the lungs, can cause significant damage. In other words, hemostasis and the clots it forms must turn on only when it's actually needed and must turn off and stay off when it's not. It's like the sprinkler system in a factory and an air bag in a car. They must deploy only when needed. Let's consider the first two components of hemostasis: blood vessel vasoconstriction and platelet aggregation. "-Comment: First problem with considering evolution inventing this is the mechanism obviously must have a controlled start and a controlled stop. This cannot be invented by hunt and peck; it must work from the beginning. After this stage the clotting factors appear and there are over 17 of them, all in beautiful coordination. I can't think of anything but design. In organisms with a blood/circulatory system this is a 'must' for life to survive.