2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lub operculum yog cov pob txha pom hauv pob txha ntses pob txha ntses Bony ntses, chav kawm Osteichthyes, yog cov pob txha pob txha es tsis yog pob txha mos. Lawv tshwm sim hauv Silurian lig, txog 419 lab xyoo dhau los. Qhov kev tshawb pom tsis ntev los no ntawm Entelognathus qhia tau hais tias cov ntses pob txha (thiab tej zaum cov ntses cartilaginous, ntawm acanthodians) tau hloov zuj zus los ntawm cov placoderms thaum ntxov. https://en.wikipedia.org › wiki › Evolution_of_fish
Evolution of ntses - Wikipedia
and chimaeras uas ua haujlwm raws li lub ntsej muag txhawb nqa thiab kev tiv thaiv npog rau cov gills; Nws kuj yog siv rau kev ua pa thiab pub.
operculum nyob qhov twg ntawm tus ntses?
Tus operculum yog pob txha npuag ntawm daim tawv nqaij hla lawv cov gills uas tiv thaivgills. Nws qhib thiab kaw los pab cov nqaij ntses ua pa thaum lawv tsis ua luam dej. Bony ntses muaj nplai, thiab feem ntau hom muaj fusiform lub cev tsim.
Vim li cas operculum nyob ze ntawm lub taub hau ntawm cov ntses?
Ntawm ntawm ob sab ntawm tus ntses taub hau, gills tshem tawm cov pa tawm hauv dej thiab nthuav cov pa roj carbon dioxide los ntawmlub cev. Cov gills yog them los ntawm lub pob txha hloov tau hu ua operculum. Qee cov ntses muaj spines nyob rau ntawm lub operculum raws li kev tiv thaiv mechanism los tiv thaiv lawv ntawm predators.
Lub hom phiaj ntawm operculum hauv ntses yog dab tsi?
Nyob rau hauv qhov sib piv, cov ntses pob txha muaj cov pob txha tshwj xeeb hu ua operculum uas cia lawv siv lawv cov gills yam tsis muaj qhov cua nkag. Covoperculum rests ncaj qha saum lub gills thiab npog lawv. Ua tsaug rau tus operculum, cov nqaij ntses tuaj yeem nqos dej thiab thawb nws los ntawm lawv cov gills.
Pob ntses muaj pes tsawg leeg?
Operculum (ntses)
Lub cev nqaij daim tawv yog lub pob txha tawv tawv npog thiab tiv thaiv cov gills. Hauv cov ntses feem ntau, lub ntug ntug ntawm lub operculum roughly marks qhov kev faib ntawm lub taub hau thiab lub cev. Lub operculum yog tsim los ntawm plaub pob txha; lub opercle, preopercle, interopercle, thiab subopercle.
Pom zoo:
Qhov twg yog qhov pom ib txwm pom thaum percussing thaj tsam plab?
Lub plab plab uas muaj roj ntau ib txwm muaj a tympanitic tympanitic Meteorism. Tshwj xeeb. Gastroenterology. Tympanite yog ib yam mob uas muaj roj ntau ntau hauv plab hnyuv thiab ua rau mob plab. Lo lus yog los ntawm Greek τύμπανο, "nruas"
Qhov twg los saib qhov pom kev tsis pom kev ntawm kev ua?
Koj muaj peev xwm kwj Txoj Kev Tsis Txaus Siab Ntawm Kev Ua los ntawm kev xauj lossis yuav hauv Google Play, Amazon Instant Video, thiab Vudu. Puas yog Qhov Teeb Meem Tsis Muaj Teeb Meem ntawm Kev Ua Hauv Netflix? Saib Qhov Teeb Meem Tsis Muaj Teeb Meem Ntawm Kev Nyob Netflix Hnub no!
Peb tuaj yeem pom qhov tsis muaj kev xyiv fab nyob qhov twg?
Sessile joyweed (Alternanthera sessilis) yog cov nroj tsuag uas muaj ntau xyoo thoob plaws hauv tropics thiab subtropics. Nws tuaj yeem loj hlob ntawm ntau hom av. Cov nroj tsuag no yog cov nplooj ntoo nrov thiab siv los ua cov nroj tsuag tshuaj ntsuab hauv South East Asia.
Koj puas tuaj yeem pom fovea centralis nrog lub qhov muag pom?
Saib ntawm Retina Los ntawm Ophthalmoscope Nyob rau sab xis yog daim duab ntawm tus neeg saib xyuas qhov muag pom thaum saib koj lub retina nrog ophthalmoscope. Qhov tsaus ntuj ze ntawm qhov chaw yog lub fovea. … Thaum peb kho (saib ncaj qha ntawm) cov khoom, cov duab ntawm cov khoom no yog npaj rau ntawm fovea.
Qhov twg yog qhov pom ze lossis pom deb?
Nearsightedness txhais tau hais tias koj lub pob muag yuav muaj qhov curvature ntau dua li qhov nruab nrab, qhov kev pom deb tuaj yeem ua rau koj lub pob muag tsis nkhaus ntau npaum li qhov yuav tsum tau ua. Cov neeg pom kev deb muaj qhov pom kev deb zoo dua, thaum neeg pom kev muaj qhov sib txawv (muaj zog nyob ze qhov muag).
