Nucleus contains mucopolysaccharide protein complex, chondroitin sulfate and a lot of water, at the time of birth of up to 90 percent moisture content, an adult is about 80 percent.

• 髓核中含有粘多糖蛋白复合体、硫酸软骨素和大量水分，出生时含水量高达90%25 ，成年后约为80%25。