Qhov sib txawv tseem ceeb ntawm nephridia thiab malpighian tubules nyob ntawm lawv qhov tshwm sim hauv cov kab mob. Nephridia muaj nyob rau hauv cov kab mob qis xws li cov cab thiab cov mollusks thaum cov tubules malpighian muaj nyob rau hauv thaj tsam tom qab ntawm cov kab thiab cov kab mob hauv av.
Kev tso tawm yog ib qho tseem ceeb ntawm cov kab mob nyob. Cov txheej txheem metabolic tsim ntau yam khoom siv excretory raws li cov khoom lag luam. Txawm li cas los xij, kev sib sau ntawm cov pov tseg hauv lub cev muaj sia nyob yog tshuaj lom thiab tsim kev puas tsuaj. Yog li ntawd, lub xub ntiag ntawm ib tug mechanism rau tshem tawm metabolic pov tseg los ntawm lub cev los ntawm ib tug system ntawm excretion yog yuav tsum tau. Yog li ntawd, ntau hom kab mob excretory muaj nyob rau hauv ntau pawg ntawm cov kab mob. Nephridia thiab malpighian tubules yog ob qho piv txwv ntawm cov kab mob excretory.
Nephridia yog dab tsi?
A nephridium yog ib qho khoom siv hauv excretory uas muaj nyob hauv cov pob txha tsis muaj zog lossis cov kab mob qis dua. Nws tshwm sim ua ib khub, thiab nws txoj haujlwm zoo ib yam li lub raum vertebrate. Raws li, lub luag haujlwm tseem ceeb ntawm nephridia yog tshem tawm cov khoom pov tseg hauv lub cev. Nephridia muaj nyob rau hauv ob hom xws li protonephridia thiab metanephridia. Protonephridia yog primitive thiab yooj yim nyob rau hauv cov qauv thiab pom nyob rau hauv lub cev hlwb. Nws feem ntau muaj nyob hauv Platyhelminthes, rotifers, memertea, lancelets thiab lwm yam.
Ib lub cell hollow muaj nyob rau hauv lub cev kab noj hniav ntawm protonephridium qhov twg ib tug duct yog ib tug txhuas los ntawm nws mus rau sab nrauv qhib ntawm lub cev. Cov qhov qhib sab nrauv no hu ua nephridiopores. Feem ntau, cov kua dej lim los ntawm lub cev kab noj hniav mus rau hauv cov hlwb hollow. Peb hu cov hlwb hollow li nplaim hluav taws yog tias lawv muaj cilia. Txwv tsis pub, peb hu lawv solenocytes yog tias lawv muaj flagella. Cov flagella lossis cilia muaj nuj nqi los yoj cov zis lim los ntawm lub raj mus rau ib puag ncig sab nraud.
Daim duab 01: Metanephridium
Tsis tas li ntawd, metanephridia tau siab dua thiab nyob hauv khub. Nws muaj nyob rau hauv cov kab mob xws li annelids, arthropods, mollusks thiab lwm yam. Lub metanephridia tsis muaj hollow hlwb. Yog li, nws qhib ncaj qha rau hauv lub cev kab noj hniav. Cilia muaj nyob rau hauv cov tubules ntawm metanephridia los yoj cov kua rau hauv ib puag ncig sab nraud los ntawm lub cev kab noj hniav. Ntau cov as-ham reabsorb los ntawm cov hlwb ntawm tubules thaum lawv kis mus rau hauv tubules.
Malpighian Tubules yog dab tsi?
Malpighian tubules yog nyias tubules tam sim no nyob rau hauv cov kwj dej alimentary ntawm arthropods. Lawv feem ntau tshwm sim ua khub, thiab cov lej sib txawv ntawm cov tubules muaj nyob rau hauv ntau hom kab mob. Ntxiv mus, malpighian tubules yog lined nrog microvilli thiab pom convoluted nyob rau hauv thiaj li yuav ua rau kom lub cheeb tsam ntawm reabsorption thiab tswj cov osmotic tshuav nyiaj li cas. Cov tubules no ua haujlwm ua ke nrog cov qog tshwj xeeb uas ua rau phab ntsa ntawm lub qhov quav.
Thaum piv nrog nephridia, tsis muaj qhov pom tshwm sim hauv tubules. Yog li, cov zis tso zis tshwm sim los ntawm tubular secretion. Cov kab mob hauv cov tubules thiab da dej hauv hemolymph siv cov tubular secretion. Yog li ntawd, kev nthuav tawm ntawm cov khoom pov tseg xws li uric acid tshwm sim dawb ntawm cov hlwb thiab cov tubules malpighian. Tsis tas li ntawd, muaj ion txauv twj tso kua mis tam sim no nyob rau hauv ob sab phlu ntawm cov tubules. Cov twj tso kua mis ions nquag thauj H+ ions mus rau hauv lub hlwb thiab Na+ thiab K+ ions tawm ntawm cov hlwb.
Daim duab 02: Malpighian Tubules
Dej diffuses passively thaum tsim zis. Yog li, kev sib pauv ntawm ions hauv thiab tawm ntawm cov hlwb nqus cov electrolytes, dej thiab uric acid rau hauv cov tubules sib npaug osmotic siab. Thaum cov kab mob nyob rau hauv kev sib cuag nrog cov dej tsis tshua muaj ib puag ncig, dej thiab electrolytes reabsorbed thaum uric acid tawm thaum nyob rau hauv kev sib cuag nrog ib tug tuab kua los yog hmoov.
Dab tsi zoo sib xws ntawm Nephridia thiab Malpighian Tubules?
- Nephridia thiab Malpighian Tubules yog cov txheej txheem excretory.
- Ob hom tshwm li tubules.
- Tsis tas li, lawv tsis nyob hauv chordates.
Qhov txawv ntawm Nephridia thiab Malpighian Tubules yog dab tsi?
Nephridia thiab Malpighian tubules yog ob lub cev tawm hauv cov kab mob uas tsis yog chordates. Nephridia tam sim no nyob rau hauv cov kab mob qis xws li cab thiab mollusks thaum Malpighian tubules muaj nyob rau hauv kab thiab terrestrial arthropods. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm nephridia thiab Malpighian tubules. Ib qho sib txawv ntxiv ntawm nephridia thiab Malpighian tubules yog tias nephridia tshwm sim feem ntau hauv khub thaum Malpighian tubules tshwm sim hauv pawg. Tsis tas li ntawd, txawm hais tias ob qho tib si hauv nruab nrog cev ua kom tiav cov kev ua haujlwm excretory, Malpighian tubules muaj lwm txoj haujlwm tseem ceeb. Qhov ntawd yog; Tsis tas li ntawm kev tso tawm, Malpighian tubules tswj cov osmotic tshuav nyiaj li cas hauv cov kab thiab cov arthropods hauv av. Txawm li cas los xij, nephridia tsis koom nrog kev tswj hwm osmotic tshuav nyiaj li cas. Yog li, qhov no kuj yog lwm qhov sib txawv ntawm nephridia thiab Malpighian tubules.
Cov hauv qab no nthuav qhia ntau qhov tseeb txog qhov sib txawv ntawm nephridia thiab Malpighian tubules.
Summary – Nephridia vs Malpighian Tubules
Cov kab mob nyob hauv yuav tsum muaj cov txheej txheem tshem tawm cov khoom pov tseg hauv lawv lub cev los ntawm kev tso tawm. Cov txheej txheem excretory muaj xws li lub hauv paus excretory. Nephridia thiab malpighian tubules yog ob lub cev excretory muaj nyob rau hauv ob pawg ntawm cov kab mob sib txawv. Nephridia tam sim no nyob rau hauv cov kab mob tsis muaj zog lossis cov kab mob qis. Lawv ua haujlwm kom tshem tawm cov kab mob metabolic ntawm worms thiab mollusks. Tsis tas li ntawd, muaj ob hom nephridia uas yog, protonephridia thiab metanephridia.
Ntawm qhov tod tes, Malpighian tubules yog cov tubules nyias uas pom muaj nyob hauv cov kwj dej ntawm cov arthropods. Malphigian tubules ua lub luag haujlwm excretory los ntawm tubular secretion, tsis zoo li nephridia. Tsis tas li ntawd, Malpighian tubules tseem ceeb rau qhov sib npaug ntawm osmotic siab vim lawv muaj cov twj tso kua mis ion ntawm lawv cov phab ntsa. Yog li, qhov no qhia txog qhov sib txawv ntawm nephridia thiab Malpighian tubules.
