Now a study shows that the omega-3 fatty acids found in fish may block not only the chemicals that cause inflammation in osteoarthritis but also the proteins known to wear down knee cartilage .
Like their close relatives the sharks , the 200-odd species of stingrays are boneless fish that boast skeletons made of tough tissue called cartilage .
刺鳐是鲨鱼的近亲,种类有200多种,善于无骨鱼类,其骨架是由软骨构成的。
He scanned the shoulders of 31 professional baseball pitchers . Their mris showed that 90 percent of them had abnormal cartilage , a sign of damage that would typically lead to surgery .