Coagulation - procoagulants. The third step, coagulation or blood clotting, reinforces the platelet plug with fibrin threads that act as a molecular glue for the aggregated platelets. The resulting blood clot (fibrin mesh) is quite effective in sealing larger breaks in a blood vessel. Blood is transformed from a liquid to a gel in a multistep process that involves a series of substances called clotting factors, or procoagulants.
Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell.Muscles function to produce force and motion. Smooth muscle or involuntary muscle is found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, urethra, bladder, blood vessels, and the arrector pili in the skin (in which it controls erection of body hair).
The muscular system is the largest system in the body. Muscles are located in practically every region of the human body. The muscular system is made up of tissues that work with the skeletal system to control movement of the human body. Muscles function is to produce force and cause motion.