Cov tib neeg vertebral kem muaj 7 lub ncauj tsev menyuam, 12 thoracic, 5 lumbar, 5 sacral, thiab 3 txog 5 coccygeal vertebrae. Tsuas yog rau lub sacral thiab coccygeal vertebrae, uas ib txwm fused, ob lub cev vertebral uas nyob ib sab thiab ib qho intervertebral disc muaj xws li ib tug vertebral motion segment.
Tib neeg puas muaj kab mob vertebrae?
Function. Lub coccyx yog tsis yog qhov tsis muaj txiaj ntsig hauv tib neeg, raws li qhov tseeb tias cov coccyx muaj txuas rau ntau cov leeg, leeg thiab ligaments. Txawm li cas los xij, cov leeg nqaij, leeg thiab ligaments tseem txuas rau ntawm ntau lwm cov ntsiab lus, kom cov qauv muaj zog dua li cov coccyx.
Muaj pes tsawg coccygeal vertebrae?
Thoracic Spine - 12 vertebrae. Lumbar Spine - 5 vertebrae. Sacral Spine - 5 fused vertebrae. Coccyx - 3-5 fused vertebrae.
Puas yog qhov coccyx ntawm vertebrae?
Lub coccyx (tseem hu ua tailbone) yog lub davhlau ya nyob twg ntawm kab vertebral. Nws muaj plaub lub vertebrae, uas fuse los tsim ib daim duab peb sab. Hauv tsab xov xwm no, peb yuav tham txog lub cev ntawm lub coccyx - nws cov qauv, cov cim ntawm pob txha, ligaments thiab qhov chaw kho mob.
Puas yog coccygeal vertebrae vestigial?
Coccyx, tseem hu ua tailbone, nkhaus, semiflexible qis kawg ntawm lub nraub qaum (vertebral kem) hauv apes thiab tib neeg, sawv cev a vestigial tail. Nws yog tsim los ntawm peb mus rau tsib successively mecaudal (coccygeal) vertebrae.
