2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Structurely, lub tawv nqaij muaj ob txheej uas sib txawv hauv kev ua haujlwm, histological tsos thiab lawv cov keeb kwm embryological. Cov txheej sab nrauv lossis txheej txheej yog tsim los ntawm epithelium thiab yog keeb kwm ntawm ectodermal. Cov txheej tuab tuab hauv qab, daim tawv nqaij, suav nrog cov nqaij sib txuas thiab tsim los ntawm mesoderm.
Raws li txoj cai, histology ntawm epidermis yog dab tsi?
Cov epidermis yog ib tug multilayered epithelial qauv tsim los ntawm keratinocytes uas tsim cov txheej txheem protein keratin. Histologically, cov epidermis yog tsim los ntawm plaub txheej nruj-ua raws txheej ntawm squamous epithelium tau teeb tsa mus rau thaj tsam ntsug sib txawv los ntawm theem sib txawv.
Qhov thib ob, cov tawv nqaij zoo li cas nyob rau ntawm lub ntsis? Dermal Papillae Thick tawv nqaij zoo li qhov no tsuas yog pom nyob rau thaj chaw uas muaj kev puas tsuaj ntau heev - xws li xibtes, ntiv tes , thiab ob txhais taw ntawm koj txhais taw. Vim li cas koj thiaj xav tias qhov no yog? Koj yuav tsum pom tias lub dermis nthuav mus rau hauv daim tawv nqaij hauv cov qauv hu ua dermal papillae. Cov no muaj ob txoj haujlwm.
Ib yam li ntawd, papillae hauv daim tawv nqaij yog dab tsi?
Cov dermal papillae (DP) (singular papilla , qhov me me ntawm Latin papula, 'ntxau') yog qhov me me, lub txiv mis zoo li txuas ntxiv (lossis cuam tshuam) ntawm daim tawv nqaij mus rau hauv daim tawv nqaij. Ntawm qhov chaw ntawm tawv nqaij ntawm tes thiab taw, lawv tshwm raws li kab mob epidermal lossis papillary ridges (paub zoo tias yog cov ntiv tes).
Qhov tuab tuab ntawm daim tawv nqaij yog dab tsi?
Cov nruab nrab square inch (6.5 cm²) ntawm tawv nqaij tuav 650 hws qog, 20 cov hlab ntsha, 60, 000 melanocytes, thiab ntau tshaj 1,000 paj hlwb. Cov nruab nrab tib neeg tawv nqaij cell yog hais txog 30 micrometers inch, tab sis muaj ntau yam.
Pom zoo:
Dab tsi yog daim ntawv qhia keeb kwm keeb kwm?
Ib daim ntawv qhia keeb kwm keeb kwm piav qhia cov ntaub so ntswg uas tau xa mus rau kev tshuaj xyuas thiab cov yam ntxwv ntawm yam mob qog noj ntshav zoo li cas hauv qab tsom iav. Ib daim ntawv qhia keeb kwm keeb kwm qee zaum hu ua daim ntawv txheeb xyuas keeb kwm lossis daim ntawv qhia txog kab mob
Dab tsi yog txheej txheej sab saum toj ntawm daim tawv nqaij nyob ib sab ntawm daim tawv nqaij?
Lub dermis txuas cov epidermis mus rau hypodermis, thiab muab lub zog thiab kev ywj pheej vim muaj cov collagen thiab elastin fibers. Nws tsuas muaj ob txheej: txheej txheej papillary nrog papillae uas nthuav mus rau hauv daim tawv nqaij thiab qis dua, txheej txheej reticular uas muaj cov ntaub so ntswg sib txuas xoob
Dab tsi yog lub luag haujlwm ntawm tus kws tshawb fawb keeb kwm keeb kwm anthropologist?
Txoj haujlwm ntawm kws tshuaj xyuas keeb kwm keeb kwm yav dhau los ua haujlwm hauv thaj chaw feem ntau suav nrog: Ua tib neeg seem. Ntxuav cov skeletal seem. Tshawb xyuas cov seem decomposed rau cov cim ntawm kev raug mob. Muab cov ntaub ntawv lom neeg txog cov seem. Sau cov ntawv ceeb toom. Ua haujlwm ze nrog cov neeg tshawb nrhiav thiab cov neeg sawv cev tshwj xeeb. Muab pov thawj hauv tsev hais plaub
Lub hom phiaj ntawm kev teeb tsa hauv keeb kwm keeb kwm yog dab tsi?
Kev sib sau yog txheej txheem uas cov ntaub so ntswg lossis cov hnoos qeev tau ntim rau hauv qhov hnyav ntawm qhov nruab nrab siv cov pwm. Txij li cov ntaub so ntswg thaiv tau tuab heev lawv xav tau kev txhawb nqa nruab nrab uas cov ntaub thaiv npog tau muab tso rau. Qhov nruab nrab txhawb nqa no yog hu ua txheej nruab nrab
Dab tsi yog qhov txawv ntawm daim tawv nqaij thiab daim tawv nqaij daim ntawv xeem?
Qauv: Sib sib zog nqus ntawm daim tawv nqaij; connective ntaub so ntswg muaj li ntawm ob txheej. Muaj nuj nqi: Muaj lub luag haujlwm rau cov txheej txheem muaj zog thiab yoog raws ntawm daim tawv nqaij; lub epidermis pauv cov pa roj, cov khoom noj, thiab cov khoom pov tseg nrog cov hlab ntsha hauv lub dermis