An agent that is smaller than a virus causes scrapie. It is either a protein called a prion or it is another substance closely associated with the prion protein. Scientists still have a lot to learn about the scrapie agent and exactly how it works.
Tissue valves are made with tissues from porcine (pig) heart valves or bovine (cow) cardiac tissue because they function like human heart valves. Once the tissue is removed from the animal, it is chemically treated to preserve the tissue and prevent immulogic reactions once it is placed in a patient.
Fibrous connective tissue, sometimes referred to as FCT, is tissue made up of high-strength, slightly stretchy fibers. These fibers consist mainly of collagen, water, and complex strands of carbohydrates called polysaccharides.They provide support and shock absorption to surrounding organs and bones.he function of fibrous connective tissue is support and structure throughout the body. Cartilage is a common form of fibrous connective tissue. Arthritis is a disease that affects connective tissue. Fibrous connective tissue forms strong, elastic structures called tendons, which attach skeletal muscles to the bone.