Blood clot formation. Overview. Blood clotting normally occurs when there is damage to a blood vessel. Platelets immediately begin to adhere to the cut edges of the vessel and release chemicals to attract even more platelets. A platelet plug is formed, and the external bleeding stops. Next, small molecules, called clotting factors, cause strands of blood-borne materials, called fibrin, to stick together and seal the inside of the wound. Eventually, the cut blood vessel heals and the blood clot dissolves after a few days. Review Date 6/16/2017 Updated by: Todd Gersten, MD, Hematology/Oncology, Florida Cancer Specialists & Research Institute, Wellington, FL.
What are muscle knots? Muscle knots are actually hyperirritable spots in muscle or fascial tissue [bands or sheets of connective tissue] known as myofascial trigger points, says Charleston. Knots are comprised of tense muscle fibers.
The overhand knot is one of the most fundamental knots and forms the basis of many others including the simple noose, overhand loop, angler's loop, reef knot, fisherman's knot, and water knot. The overhand knot is very secure, to the point of jamming badly. It should be used if the knot is intended to be permanent.