Yadda yawa vertebrae a cikin mutum adadi ne, ba wuya

A kashin baya shafi aikin wani mutum mai yawa ayyuka: shi kare da laka, tana goyon bayan jiki a sarari, da hidima a matsayin wani kulle domin gabobin da tsokoki, da kuma samar da zirga-zirga. Ya kunshi raba abubuwa, wanda ake kira vertebrae. Suna motsi daga shugaban wani sashe mai yawa na nauyi, kuma saboda wannan ne mafi zama da mafi m.

Tambayar da yawa vertebrae a cikin mutane, zaunar na dogon lokaci. A total na wani mutum tsakanin 32 da 34, da kuma sun rabu da juna ta hanyar intervertebral fayafai, wanda sun tabbata za a bayar da kuma motsi na jiki. A kashin baya ne zuwa kashi da dama sassan. A farko division aka kira wuyansa, na biyu - da thoracic, da kuma na uku - da lumbar, sacral, sa'an nan ke coccyx sassan. A tsarin da kowane bijiro da batun kafa kashi na kashin baya ne irin wannan ba, fãce a 'yan bambance-bambance. Muhimmanci bambance-bambance da farko da na biyu.

Sa'an nan da yawa vertebrae a mutum a kowane sashen? A cikin mahaifa saki bakwai a nono - goma sha biyu, wakilta biyar m lumbar vertebrae. Biyar sacral Fused cikin guda monolith, da ake kira da sacrum. Amma wutsiya saura kunshi da vertebrae bayar a wani adadin daga uku zuwa biyar.

Kowane sashi na da sifofin. Shi ne mafi kyau ga nazarin tsarin da mutum kashin baya a hotuna. Suna iya zama madadin ko na halitta shirye-shirye moulage. Vertebra - mafi sauki kashi, wanda ya hada da kwarangwal na wani mutum. A kashin baya, duk da da sauki - mai da muhimmanci sosai bangare, rauni ko lalacewa wanda zai iya kai ga tsanani sakamakon.

Mun riga samu daga nawa vertebrae a cikin mutane, za mu iya kawai a takaicce bayyana kowane daga cikinsu ta hanyar sashen. A farko mahaifa ne ake kira "Atlas", to shi ta kai ne a haɗe kai tsaye. A jikin shi ba shi da, shi ya wuce zuwa na biyu mahaifa vertebra a cikin wani nau'i na hakori. Jikinsa ya zauna a cikin sauran wakilan da mahaifa kashin baya. Laterally a cikin mahaifa vertebrae da ramuka cewa, samar da tashar. Kamar yadda wuce da arteries ciyar da kwakwalwa. A vertebrae kansu tare da sauran sassa na laka iyakance tashar a cikin abin da shi a zahiri ya wuce.

A thoracic vertebrae suna bambanta da gaban ramukan. A waɗannan rami suna a haɗe hakarkarinsa, wanda ya samar da da thorax tare da sternum. A vertebral jikuna a wannan sashen mafi m, da kuma tashar da jijiya ne ba ya nan, akwai kawai wani tashar ga laka. Lumbar yankin Bears brunt mafi daga cikin jikin mutum, kuma yana da manyan da kuma m vertebrae.

Bayan da lumbar kamata sacrum. Wannan kashi-monolith, shi ne ake nufi a cikin samuwar ƙashin ƙugu. Daga shi zo da wani babban yawan jijiyoyi da cewa su fito daga cikin ramuka a cikin kafafuwa da kuma mayar. A sacrum rarrabe pelvic m surface (ko gaban) da kuma m baya (ko raya). A amsar wannan tambaya, da yawa vertebrae a mutum coccygeal sashen ne shubuha - yawan dabam. Great darajar, wannan sashen yana ba. Don shi hašawa tsokoki. A coccyx ne iya barinta lokacin haihuwa a mata, game da shi kara da fitarwa girman da kafafuwa.