Qhov sib txawv tseem ceeb ntawm hom 1 thiab hom 2 pneumocytes yog hom 1 pneumocytes yog nyias thiab flattened alveolar hlwb uas yog lub luag hauj lwm rau cov pa pauv ntawm alveoli thiab capillaries, thaum hom 2 pneumocytes yog cuboidal alveolar hlwb uas yog lub luag hauj lwm rau. Kev tso tawm ntawm pulmonary surfactants uas txo qhov nro ntawm lub alveoli.
Pneumocytes yog cov kab mob epithelial ntawm lub alveoli. Lawv kuj hu ua alveolar cells. Cov hlwb no kab ntawm alveoli thiab muaj nyob rau hauv feem ntau ntawm sab hauv ntawm lub ntsws. Muaj ob hom pneumocytes li hom 1 thiab hom 2 pneumocytes. Ntau tshaj 95% ntawm alveoli nto yog kab los ntawm hom 1 pneumocytes. Lawv yog flattened, nyias thiab loj hlwb. Hom 2 pneumocytes yog cov hlwb me me uas tsis npog ntau qhov chaw ntawm alveoli. Lawv muaj secretory organelles uas secrete pulmonary surfactants kom txo qhov nro nyob rau hauv lub alveoli.
Pneumocytes Hom 1 yog dab tsi?
Hom 1 pneumocytes yog ib qho ntawm ob hom pneumocytes pom nyob rau hauv cov phab ntsa alveolar. Lawv yog flattened alveolar hlwb uas npog ntau tshaj 95% ntawm thaj tsam ntawm alveoli. Cov hlwb no koom nrog cov txheej txheem ntawm kev sib pauv roj ntawm alveoli thiab capillaries. Qhov tseeb, lawv tsim ib feem ntawm kev thaiv hla qhov kev sib pauv roj tshwm sim.
Daim duab 01: Hom 1 thiab Hom 2 Pnemocytes
Hom 1 pneumocytes yog cov hlwb nyias heev. Yog li ntawd, lawv txo qhov diffusion nrug rau cov pa roj pa. Txhawm rau tiv thaiv cov kua dej tawm mus rau hauv qhov chaw alveolar huab cua, hom 1 pneumocytes txuas nrog occluding junctions.
Pneumocytes Hom 2 yog dab tsi?
Hom 2 pneumocytes yog ib hom alveolar hlwb uas yog cuboidal hauv cov duab. Lawv npog thaj tsam tsawg dua (kwv yees li 5%) ntawm alveoli piv rau hom 1 hlwb. Hom 2 pneumocytes yog lub luag haujlwm tsim cov pulmonary surfactants txhawm rau txo qhov nro ntawm lub alveoli. Yog li ntawd, hom 2 hlwb muaj cov organelles secretory tag nrho ntawm granules (lamellar lub cev) los tsim cov surfactants.
Daim duab 02: Hom 2 Pneumocytes
Piv rau hom 1 hlwb, hom 2 hlwb me dua. Txawm li cas los xij, lawv yog cov hlwb ntau tshaj plaws hauv alveoli. Hom 2 pneumocytes tuaj yeem proliferate thiab sib txawv rau hauv hom 1 hlwb kom them rau cov hlwb puas.
Dab tsi yog qhov zoo sib xws ntawm Hom 1 thiab Hom 2 Pneumocytes?
- Hom 1 thiab hom 2 pneumocytes yog ob hom pneumocytes lossis alveolar cells.
- Lawv yog cov hlwb epithelial.
- Lawv muaj nyob hauv phab ntsa alveolar.
Qhov txawv ntawm Hom 1 thiab Hom 2 Pneumocytes yog dab tsi?
Hom 1 pneumocytes yog qhov nyias nyias, cov kab mob sib kis hauv cov kab mob alveoli, thaum hom 2 pneumocytes yog cov hlwb me me uas muaj cov kab mob zais zis. Ntxiv mus, kev ua haujlwm, hom 1 pneumocytes yog lub luag haujlwm rau cov txheej txheem ntawm kev sib pauv roj ntawm alveoli thiab capillaries, thaum hom 2 pneumocytes yog lub luag haujlwm rau kev tso tawm ntawm pulmonary surfactants txhawm rau txo qhov nro. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm hom 1 thiab hom 2 pneumocytes.
Cov hauv qab no infographic teev ntau qhov sib txawv ntawm hom 1 thiab hom 2 pneumocytes hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Hom 1 vs Hom 2 Pneumocytes
Pneumocytes yog cov hlwb epithelial nyob rau hauv lub alveoli hauv lub ntsws. Muaj ob hom pneumocytes hom 1 thiab hom 2. Hom 1 pneumocytes yog cov hlwb nyias nyias uas yog lub luag haujlwm rau kev sib pauv roj ntawm alveoli thiab capillaries. Hom 2 pneumocytes yog cov hlwb me me uas yog cuboidal hauv cov duab. Lawv yog lub luag haujlwm rau kev tso tawm ntawm pulmonary surfactants txhawm rau txo qhov nro ntawm lub alveoli. Hom 2 hlwb yog cov hlwb ntau tshaj plaws hauv lub ntsws. Qhov tseem ceeb tshaj plaws, hom 2 pneumocytes tuaj yeem nthuav dav thiab sib txawv rau hauv hom 1 hlwb kom them nyiaj rau cov hlwb puas. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm hom 1 thiab hom 2 pneumocytes.
