ããç·æ§å¥³æ§ç骶骨é½æ¯ä¸æ ·çï¼é½æ8个å.
ãã人ä½çäºå骶æ¤åæçä¸å骨ã为骨ççåå£ãä¸ä¸ç¬¬äºè
°æ¤ç¸è¿ï¼ä¸ä¸å°¾éª¨ç¸è¿ã
ãã骶骨ï¼sacrumï¼ï¼ååä¸è§å½¢ï¼åºåä¸ï¼å°åä¸ï¼åé¢å¹é·ï¼ä¸ç¼ä¸åååéçªç§°å²¬ï¼ä¸é¨æ4æ¡æ¨ªçº¿ï¼æ¨ªçº¿ä¸¤ç«¯æ4对骶ååãèé¢ç²ç³éå¸ï¼æ£ä¸é¨ä¸ºéª¶æ£ä¸åµ´ï¼ä¸é´é¨ä¸ºéª¶ä¸é´åµ´ï¼æ¤åµ´å¤ä¾§æ4对骶ååï¼åå¤ä¾§é¨æ骶å¤ä¾§åµ´ã骶åååä¸éª¶ç®¡ç¸éï¼æ骶ç¥ç»åï¼åæ¯éè¿ã骶管ä¸ç«¯çè£å为骶管è£åï¼ä¸¤ä¾§åä¸çªåºä¸ºéª¶è§ã骶骨å¤ä¾§é¨ä¸ä»½æè³ç¶é¢ï¼ä¸é«éª¨è³ç¶é¢ç¸å ³èï¼è³ç¶é¢åæ¹éª¨é¢å¹å¸ä¸å¹³ç§°éª¶ç²éã