Qhov txawv ntawm pob txha liab thiab daj yog cov pob txha liab yog lub luag haujlwm rau kev tsim cov qe ntshav tshiab txhua feeb hauv peb lub cev thaum cov pob txha daj yog lub luag haujlwm rau cov roj cia.
Cov pob txha pob txha nyob hauv qhov chaw nruab nrab ntawm cov pob txha trabeculae thiab feem ntau muaj ntau lub ntsiab lus, suav nrog cov hlab ntsha, paj hlwb, mononuclear phagocytes, qia hlwb, cov qe ntshav ntawm ntau theem ntawm kev loj hlob thiab rog. Nws yog plaub lub cev loj tshaj plaws ntawm tib neeg lub cev thaum piv rau nws lub cev hnyav. Yog li, lub luag haujlwm tseem ceeb ntawm cov pob txha pob txha yog muab cov qe ntshav liab, cov qe ntshav dawb, thiab platelets, raws li lub cev xav tau. Tsis tas li ntawd, nws kuj ua raws li cov roj reserves hauv lub cev. Hauv cov neeg laus, cov pob txha nquag muaj nyob rau hauv cov pob txha hauv plab, vertebrae, cranium thiab mandible, sternum thiab tav, thiab qhov kawg ntawm lub humerus thiab femur. Raws li qhov muaj pes tsawg leeg, muaj ob hom pob txha pob txha; pob txha daj thiab pob txha liab. Lub hom phiaj ntawm tsab xov xwm no yog los tham txog qhov sib txawv ntawm cov pob txha liab thiab daj.
pob txha liab yog dab tsi?
Red marrow tsim ib qho muag heev, vascular, fibrous cov ntaub so ntswg uas muaj hematopoietic qia hlwb. Cov qia hlwb no tsim cov khoom ntawm tes nrog rau cov qe ntshav liab, cov qe ntshav dawb, thiab cov platelets kom ua tau raws li qhov yuav tsum tau ua rau oxygenation, coagulation thiab tiv thaiv kab mob. Cov pob txha liab kuj tseem ua rau kev puas tsuaj ntawm cov qe ntshav liab qub hauv lub cev. Thaum yug los, tsuas muaj pob txha liab nyob hauv lub cev.
Daim duab 01: Pob Txha Liab
Txawm li cas los xij, nrog kev yug me nyuam, kev hloov pauv ntawm cov pob txha liab mus rau cov pob txha daj pib tam sim ntawd, thiab nws nce zuj zus los ntawm qhov chaw mus rau qhov nruab nrab ntawm cov pob txha. Hauv cov vertebrates siab dua xws li tsiaj txhu, cov ntshav tsim hauv cov neeg laus feem ntau tshwm sim hauv cov pob txha liab. Tab sis hauv cov vertebrates qis dua, qee lub cev xws li daim siab thiab tus po kuj tuaj yeem tsim cov qe ntshav.
Yellow Bone Marrow yog dab tsi?
Cov pob txha daj muaj cov rog ntau (80%) thiab tsis ua haujlwm haematopoietically. Nws muaj nyob rau hauv lub medullary kab noj hniav thiab lub hollow sab hauv ntawm nruab nrab ib feem ntawm cov pob txha ntev. Cov pob txha daj feem ntau ua haujlwm raws li qhov chaw cia ntawm cov rog thiab tuaj yeem hloov mus rau cov pob txha liab hauv qee yam mob xws li ntshav poob lossis kub taub hau.
Daim duab 02: Yellow Bone Marrow
Feem ntau cov rog rog no yog qhov chaw kawg rau lub cev xav tau lub zog thiab tuaj yeem siv tau thaum muaj kev tshaib plab heev. Tab sis, nws lub luag haujlwm tseem ceeb yog kev hloov pauv mus rau hauv cov pob txha liab raws li qhov xav tau los ntawm lub cev. Cov pob txha daj tuaj yeem hloov nws tus kheej li ntawm 1 mus rau 2 teev los tuav lub luag haujlwm ntawm pob txha liab.
Dab tsi zoo sib xws ntawm pob txha liab thiab daj?
- Ob hom pob txha pob txha muaj cov hlab ntsha thiab cov hlab ntsha.
- Tsis tas li, ob leeg muaj ob hom qia hlwb; mesenchymal thiab hematopoietic qia hlwb.
Dab tsi yog qhov txawv ntawm pob txha liab thiab daj?
Qhov sib txawv tseem ceeb ntawm cov pob txha liab thiab daj yog nyob ntawm lub luag haujlwm tseem ceeb ntawm txhua pob txha pob txha. Cov pob txha liab tsim cov qe ntshav tshiab thaum cov pob txha daj khaws cov rog. Tsis tas li ntawd, cov pob txha liab muaj 40% dej, 40% rog, thiab 20% proteins thiab muaj vascularized heev. Hauv qhov sib piv, cov pob txha daj muaj 15% dej, 80% rog, thiab 5% protein thiab tsis zoo vascularized. Yog li, nws yog lwm qhov sib txawv ntawm pob txha liab thiab daj.
Ntxiv mus, nyob rau hauv cov neeg laus, cov pob txha peripheral muaj cov pob txha daj, thaum cov pob txha liab yog nyob rau sab qaum, cov tav, proximal femur thiab humerus thiab pob txha taub hau. Li no, nws kuj yog qhov sib txawv ntawm cov pob txha liab thiab daj. Ib qho tseem ceeb ntawm qhov sib txawv ntawm cov pob txha liab thiab daj yog cov pob txha liab yog tsim los ntawm leucocytes thiab platelet precursors thiab haematopoietically active, whereas daj pob txha pob txha yog haematopoietically inactive. Tsis tas li ntawd, tus nqi ntawm cov pob txha liab tseem txo qis thaum cov pob txha daj tseem nce ntxiv mus rau lub neej. Yog li ntawd, peb tuaj yeem xav txog qhov no kuj yog qhov sib txawv ntawm cov pob txha liab thiab daj.
Summary – Liab vs Yellow Pob Txha
Muaj ob hom pob txha pob txha uas yog pob txha liab thiab pob txha daj. Cov pob txha liab muaj cov kab mob hematopoietic thiab yog lub luag haujlwm rau kev tsim cov qe ntshav tshiab xws li cov qe ntshav liab, cov qe ntshav dawb thiab platelets. Ntawm qhov tod tes, cov pob txha daj muaj mesenchymal qia hlwb thiab yog lub luag haujlwm tseem ceeb rau kev khaws cia rog. Tsis tas li ntawd, cov pob txha liab yog cov ntaub so ntswg vascularized heev thaum cov pob txha daj daj tsis zoo vascularized. Tsis tas li ntawd, tus nqi ntawm cov pob txha liab txo qis nrog kev laus thaum cov pob txha daj daj tuaj nrog kev laus. Yog li, qhov no qhia txog qhov sib txawv ntawm cov pob txha liab thiab daj.
