MALO OGULITSA komanso Zochokera ku Msana Wathunthu

Chingwe cholimbitsa msana chimafika kuchokera pansi penipeni pa ubongo mpaka kukomoka kwa gawo la 12th, ndi 1st lumbar vertebrae; Kutalika kwake kumatsika kumatchedwa terminal filament, yomwe imamangiriridwa pansi pa coccyx. Chingwe cha msana chimakhala ndi ngalande yapakati, kutalika kumatsikira pansi kwamitsempha yaubongo; pansipa, pa mluza, ngalande iyi imafika kumapeto kwa chinsalu chakumapeto, koma mwa akuluakulu imakhala yolumikizidwa mkati mwa chinsalu ndipo imazimiririka mwinanso kuchepera, pakutha kwa madzi. anthu.

Mzere wa msana umagawidwa mu magawo asanu: chiberekero, chigoba, ndi lumbar vertebrae, ndi sacrum ndi coccyx. Ndondomeko ya bony ndi mawonekedwe a vertebrae amapanga mazenera kumbali zonse ziwiri zomwe zimadutsa mitsempha ya m'mphepete mwa khosi, thunthu, ndi kumtunda ndi m'munsi, (mkuyu VI-A, b).