Video: Cov pob txha twg yog cov pob txha compact?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Kev cog pob txha tsim lub plhaub nyob ib puag ncig tshem tawm pob txha thiab yog lub hauv paus tseem ceeb ntawm qhov ntev pob txha ntawm caj npab thiab ceg thiab lwm yam pob txha , qhov twg nws xav tau lub zog thiab nruj dua. Paub tab pob txha compact yog lamellar, lossis txheej, hauv cov qauv.
Ntawm no, puas yog tag nrho cov pob txha muaj pob txha txhaws thiab txhaws?
Qhov twg pob txha compact cov ntaub so ntswg txheej txheej txheej ntawm tag nrho cov pob txha , spongy luj los yog cancellous pob txha tsim cov txheej sab hauv tag nrho cov pob txha . Cov pob txha cov ntaub so ntswg ua tsis muaj osteons uas tsim pob txha compact cov ntaub so ntswg. Hloov chaw, nws suav nrog trabeculae, uas yog lam tias yog teem ua pas los yog daim hlau.
qhov pob txha pob txha nyob qhov twg? Pob txha Compact Nws tuaj yeem pom nyob hauv qab periosteum thiab hauv diaphyses ntev pob txha , qhov twg nws muab kev txhawb nqa thiab kev tiv thaiv. Microscopic structural unit ntawm pob txha compact hu ua osteon, lossis Haversian system.
Khaws qhov no saib, dab tsi yog cov qauv ntawm cov pob txha compact?
Cov pob txha me me muaj cov pob txha zoo sib xws lossis cov haversian systems. Lub pob txha muaj ntawm lub hauv paus kwj dej hu ua osteonic (haversian) kwj dej, uas nyob ib puag ncig los ntawm cov nplhaib sib xyaw (lamellae) ntawm matrix . Nruab nrab ntawm cov rings ntawm matrix , luj hlwb (osteocytes) nyob hauv qhov chaw hu ua lacunae.
Dab tsi yog qhov txawv ntawm pob txha spongy thiab pob txha compact?
Cov pob txha compact yog tam sim no hauv txheej txheej ntev pob txha , thaum cov pob txha yog tam sim no hauv nruab nrab ntawm qhov ntev pob txha . Lub ntsiab qhov sib txawv ntawm spongy thiab pob txha compact yog lawv cov qauv thiab kev ua haujlwm.
Pom zoo:
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calcaneus Tom qab ntawd, ib tus tuaj yeem nug, lub npe ntawm cov pob txha tarsal loj tshaj plaws yog dab tsi? calcaneus Ntxiv mus, 7 pob txha tarsal yog dab tsi? Cov pob txha tarsal yog 7 tus lej. Lawv npe hu ua calcaneus , talus , kub , navicular , thiab nruab nrab, nruab nrab, thiab ib sab cov cuneiforms .
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