![Yuav ua li cas daim txhuam cev yug? Yuav ua li cas daim txhuam cev yug?](https://i.answers-medical.com/preview/medical-health/13918322-how-is-a-sponge-born-j.webp)
Video: Yuav ua li cas daim txhuam cev yug?
![Video: Yuav ua li cas daim txhuam cev yug? Video: Yuav ua li cas daim txhuam cev yug?](https://i.ytimg.com/vi/k-ZWn2pcNDg/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Me nyuam daim txhuam cev yog nws txoj hauv kev thaum lub qe thiab lub cev fertilizing sib ntsib thiab dhau los ua ib qho. Tseem nyob hauv niam txiv daim txhuam cev , lub qe fertilized faib ua ob lub cell, tom qab ntawd hauv plaub, yim, kaum rau thiab 32 hlwb. Me me embryo tam sim no pib ua kom zoo nkauj.
Xav txog qhov no, dej hiav txwv sponges yug li cas?
Tom qab fertilization hauv av daim txhuam cev , ib tug larva raug tso rau hauv dej. Nws ntab ib ncig ob peb hnub thiab tom qab ntawd ua rau khov kho kom pib nws txoj kev loj hlob mus rau ib tus neeg laus daim txhuam cev . Sponges kuj tseem tuaj yeem rov tsim dua asexually los ntawm kev tawg paj.
Tsis tas li ntawd, daim txhuam cev nyob li cas? Sponges nyob ntawm txhua qhov tob hauv ob puag ncig hiav txwv thiab dej tshiab, thiab nyob hauv ntau yam xwm txheej. Lawv yog tsiaj "sessile" (lawv tsis txav mus los) thiab lawv nyob los ntawm kev tso dej ntau dhau los ntawm lawv lub cev thiab lim tawm cov kab mob me me thiab cov khoom organic ua zaub mov.
Ib yam nkaus, daim txhuam cev zoo li cas?
Sponges tsis muaj lub paj hlwb lossis lub cev zoo li feem ntau cov tsiaj ua . Qhov no txhais tau tias lawv tsis muaj qhov muag, pob ntseg lossis lub peev xwm ntawm lub cev hnov dab tsi. Lawv lub cev yooj yim zoo ib yam li cov tswv cuab ntxov tshaj plaws ntawm tsiaj txhu.
Nws siv sijhawm ntev npaum li cas rau daim txhuam cev kom loj hlob?
Sponges nyob rau thaj tsam huab cua nyob tau tsawg kawg ob peb xyoos, tab sis qee hom tsiaj tauj thiab tej zaum qee qhov tob hauv dej hiav txwv tuaj yeem nyob rau 200 xyoo lossis ntau dua. Qee cov calcified demosponges loj hlob tsuas yog 0.2 hli (0.0079 hauv) hauv ib xyoos thiab, yog tias tus lej ntawd tsis tu ncua, qhov piv txwv 1 m (3.3 ft) dav yuav tsum yog txog 5,000 xyoo qub.
Pom zoo:
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Tus poj niam zoo nkauj, txawj ntse, thiab saib xyuas, Georgiana yog lub cev thiab sab ntsuj plig zoo nkauj. Nws qhov tsis zoo tsuas yog me me liab cim zoo li txhais tes me me ntawm nws sab plhu. Georgiana pe hawm nws tus txiv thiab xa mus rau nws qhov kev xav tsis tsim nyog, txawm tias nws xav tias lawv yuav tua nws
Qhov kev sib txhuam txhuam zoo li cas?
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Pleural txhuam txhuam yog lub suab tsis zoo hauv lub ntsws uas tshwm sim los ntawm kev mob ntawm txheej txheej pleural ntawm lub ntsws rub ua ke. Pleural txhuam txhuam tau hnov ntawm kev tshoov siab thiab tas sij hawm thiab suab zoo li suab nrov qis/ua kom nrov nrov
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Cov qauv ntawm lub cev yooj yim tshaj plaws hauv daim txhuam cev yog lub raj lossis lub vase lub npe hu ua 'asconoid', tab sis qhov no txwv qhov loj ntawm tus tsiaj. Lub cev qauv yog tus yam ntxwv zoo li spongocoel puag ncig los ntawm ib txheej ntawm choanocytes. Asconoid sponges tsis tshua muaj ntau tshaj 1 hli (0.039 hauv) txoj kab uas hla
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Auscultation nrog lub diaphragm ntawm lub stethoscope nyob rau sab laug sab sternal ntug los yog apex thaum lub sij hawm kawg tas sij hawm nrog tus neeg mob zaum thiab leaning rau pem hauv ntej (los yog ntawm tes thiab lub hauv caug) tso cai rau qhov zoo tshaj plaws nrhiav tau ntawm lub rub thiab ua rau kom muaj feem ntawm kev soj ntsuam qhov kev tshawb pom
Yuav ua li cas koj txhuam nrog hluav taws xob txhuam hniav?
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Qee tus txhuam hniav txhuam hniav hluav taws xob muaj peev xwm ntau dua. Txhawm rau siv cov txhuam hniav uas muaj hluav taws xob, tsuas yog muab cov tshuaj txhuam hniav tso rau ntawm lub taub hau txhuam thiab tuav tus txhuam hniav ntawm 45-degree lub kaum ntse ntse, ib yam li koj xav tau ib tus txhuam hniav txhuam